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Honkai: Star Rail

Cosmicon, Roll On Event Guide

Add to Watchlist

★ Exclusive: Check out the State of Meta in 4.0!
♦ Latest: 4.0 Redeem Codes
♦ Phase 1: Yao Guang, Evernight, Hysilens, Black Swan
♦ Phase 2: Sparkxie, Sparkle, Cerydra, Rappa
♦ Events: Cosmicon, Roll On!, Ding! Arcadia Fun-Time Clock-In Essentials

Honkai Star Rail - Cosmicon Roll On Event Guide

Cosmicon, Roll On is a card battler event in Honkai: Star Rail 4.0. See the event details, best cards and Prismatic Dice to use, how to play the event, and all of the rewards here!

Cosmicon, Roll On Event Information

Cosmicon, Roll On Event Details

HSR - Cosmicon Roll On
Event Period Feb. 13 - Mar. 23, 2026
How to Unlock Finish No Aha at Full Moon Trailblaze Mission
Unlock Early via Finality's Vision at Trailblaze Level 21 or Higher
Rewards
+ Free 4-Star Character
+ Trailblaze Fashion Headgear

Cosmicon, Roll On! is a card event where you will need to strategically defeat opponents with your chosen character card and dice!

All Events and Schedule

How to Unlock Cosmicon, Roll On

Finish No Aha at Full Moon

Honkai Star Rail - No Aha at Full Moon Mission

To unlock Cosmicon, Roll On event, players must complete the No Aha at Full Moon Trailblaze Mission!

No Aha at Full Moon Mission Guide

Unlock Early with Finality's Vision

If you're at Trailblaze Level 21 or higher, it's possible to unlock the event without clearing the pre-requisite mission above! Finality's Vision will temporarily be available during the event period to let you start the event early.

How to Increase Your Trailblaze Level Fast

Cosmicon, Roll On Stage Guides

All Cosmicon, Roll On Opponents

Mogura Invasion Opponents
HSR Cosmicon Roll On - SvarogSvarog HSR Cosmicon Roll On - ClaraClara HSR Cosmicon Roll On - ServalServal
HSR Cosmicon Roll On - LynxLandau Family HSR Cosmicon Roll On - JulianJulian HSR Cosmicon Roll On - HookHook
The Formidable Four Opponents
HSR Cosmicon Roll On - SparxieSparxie HSR Cosmicon Roll On - RappaRappa HSR Cosmicon Roll On - Yao GuangYao Guang HSR Cosmicon Roll On - SeeleSeele

There are a total of 10 Story Opponents to beat in Cosmicon, Roll On. Click on the links in the table above to jump to guides for each story battle!

How to Beat Svarog

Recommended Character Card
HSR Cosmicon Roll On - Firefly CardFirefly

In Svarog's card match, the game will automatically recommend that you purchase and use Firefly's card. Firefly can perform a Combo or additional attack if your chosen dice contain 2 pairs of matching numbers.

Additionally, the final attack damage will be increased by 5 if Firefly's HP is still full, so it's important that you get as many points possible in the first Attack turn. Use rerolls to try and get more matching pairs of dice and save your Prismatic Dice rolls for Attack phases.

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How to Beat Help-Me Clara

Recommended Character Card
HSR Cosmicon Roll On - Hyacine CardHyacine

The Hyacine card is recommended in Clara's match. Although she has lower HP than The Herta, this can work in your favor since this stage has the High Temperature condition that buffs the card with less HP. Use your rerolls and Prismatic Dice in the Attack phase to roll 6s as much as you can to boost Hyacine's damage.

Be sure to watch out for the Temporal Storm condition, since selecting dice that are all 6 in value while it's active will swap your HP with the opponent's. Once this weather condition has been cleared, you'll be safe to select 6s again.

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How to Beat Melodic Demon Serval

Character Card Prismatic Die
HSR Cosmicon Roll On - The Herta CardThe Herta HSR Cosmicon Roll On - True Berserker DiceTrue Berserker

The Herta's card is best used for Serval's card match. At this point, you'll also unlock the ability to change Prismatic Dice. Since The Herta gets Prismatic Dice rolls with every turn, you can quickly funnel more dice points by equipping the True Berserker die.

True Berserker also has more chances of rolling onto its special faces, so you can consistently stack more attack and defense points against Serval's turns. The Thorn damage from the die will still be manageable as The Herta's card inherently has a lot of HP.

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How to Beat The Landau Family

Character Card Prismatic Die
HSR Cosmicon Roll On - Acheron CardAcheron HSR Cosmicon Roll On - True Sorcerer DiceTrue Sorcerer

It's best to use Acheron's when going up against the Landau Family. Since their Phainon card can heal itself whenever it attacks, Acheron's Perforation ability will be especially helpful in bringing down Phainon's HP much faster.

Try to roll as many 4s as you can to activate the ability and disregard their defense when attacking. Activating Perforation also increases your ATK level so you can select more dice in future turns.

To help with this, you can use the True Sorcerer die since it has more chances of roll 4s. Once you get a higher ATK level, you can stack more dice points together with the points of True Sorcerer's special faces to deal heavier attacks.

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How to Beat Thousand-Faced Julian

Character Card Prismatic Die
HSR Cosmicon Roll On - The Herta CardThe Herta HSR Cosmicon Roll On - True Berserker DiceTrue Berserker

The Herta is also recommended when battling Julian. The Herta's HP will easily be able to withstand the Instant Damage inflicted by Julian's March 7th card.

When paired with the True Berserker die again, The Herta can dish out more damage and put up a stronger defense whenever it rolls onto its special faces.

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How to Beat Pitch-Dark Hook the Great

Character Card Prismatic Die
HSR Cosmicon Roll On - Phainon CardPhainon HSR Cosmicon Roll On - True Magic Bullet DiceTrue Magic Bullet

You're scripted to lose when fighting against Hook for the first time. After she gets exposed for cheating, her Castorice card will get its normal abilities again. For the real fight, use the Phainon card for better survivability and stronger dice rolls.

Use the True Magic Bullet die during Attack phases to boost Phainon's attack points and deal Instant Damage. Since Castorice's ATK and DEF increase whenever she takes a certain amount of damage, you should try to bring down her HP as much as possible in the first few turns before they get too high.

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How to Beat Sparxie

Character Card Prismatic Die
HSR Cosmicon Roll On - The Herta CardThe Herta HSR Cosmicon Roll On - True Berserker DiceTrue Berserker

The Herta is recommended again for Sparxie's card match. Since her Kafka card can quickly build up Poison stacks, The Herta's HP will be able to withstand its damage. Equip True Berseker to maximize on dice points every turn.

A Poison stack is removed every time Kafka fails to defend, so it's especially important to use the Prismatic Die in the Attack phase. After triggering True Berserker's special effect 4 times, you'll activate The Herta's Arise ability, which will make your dice rolls even stronger.

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How to Beat Rappa

Character Card Prismatic Die
HSR Cosmicon Roll On - Castorice CardCastorice HSR Cosmicon Roll On - True DoctorTrue Doctor's Advice

The Castorice card works well in Rappa's match. Equip the True Doctor's Advice die to maintain HP and boost dice points during the Attack phase. Since Rappa's Permansor Terrae card can easily build up its DEF, you'll want to intentionally take at least 8 DMG during Defense phases.

With this, you can activate Castorice's ability to increase both its ATK and DEF levels. Eventually, you should be able to select a lot of dice during your turns and deal hefty amounts of damage. The healing from True Doctor's Advice should be able to mitigate the damage from the initial hits needed to strengthen Castorice.

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How to Beat Yao Guang

Character Card Prismatic Die
HSR Cosmicon Roll On - Castorice CardCastorice HSR Cosmicon Roll On - True DoctorTrue Doctor's Advice

Castorice is also recommended in Yao Guang's match. You can use the previous strategy of increasing Castorice's ATK and DEF by intentionally taking damage during the Defense phase. Once it's time to attack, use True Doctor's Advice and rerolls to get higher attack points and restore the lost HP.

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How to Beat Seele

Character Card Prismatic Die
HSR Cosmicon Roll On - Firefly CardFirefly HSR Cosmicon Roll On - True Sorcerer DiceTrue Sorcerer

Firefly is recommended once more in the final card match against Seele. Although her Cyrene card can quickly become stronger, Firefly can take advantage of the High Temperature and Crepuscular Rays conditions since the card has less HP.

During the Attack phase, use True Sorcerer and your rerolls to try and get 6-point special faces and other pairs of matching dice. Strong dice rolls stacked together with Firefly's Combo ability will allow you to quickly bring down most of Cyrene's HP in the first turn.

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How to Play Cosmicon, Roll On

Cosmicon, Roll On Gameplay

Select Your Character Card

HSR Cosmicon Roll On - Select Your Character Card

In the Cosmicon, Roll On event, you can collect various Character Cards that have their own unique abilities. For each card battle, you'll only need to use one Character Card, so try pick a card that can fight well against your opponent's!

Purchase More Cards with Tokens

HSR Cosmicon Roll On - Purchase More Cards with Tokens

The Victorious Power Tokens earned from completing story matches can be used to obtain 3-star cards that are much stronger. As you beat more story opponents, you'll also unlock more Character Cards for purchase!

Equip Prismatic Dice

HSR Cosmicon Roll On - Equip Prismatic Dice

Prismatic Dice are extra dice that can be rolled in limited amounts during a match. Each Character Card already has their own die by default, but you can purchase new ones and swap them around.

Some Prismatic Dice only roll certain numbers, while some have faces that can trigger additional effects when rolled and selected! These can quickly change the tide of the battle, so remember to check which ones would be most effective with your chosen card.

Take Turns Attacking and Defending

HSR Cosmicon Roll On - Take Turns Attacking and Defending

Each player in the match will take turns rolling the dice to attack and defend. During the Attack phase, you must select a number of rolled dice based on your card's ATK and Dice Types. You can also reroll your dice to get better points and increase your total attack damage.

Those in the Defense phase must select their rolled dice to decrease the damage of the other player's attack. The total damage received is computed by subtracting the total Defense points from the total Attack points that were set up during the turn.

Based on your Character Card, getting a specific combination of dice faces will also allow you to trigger your card's ability. You win the match once you're able to get your opponent down to 0 HP!

Watch Out for Weather Conditions

HSR Cosmicon Roll On - Watch Out for Weather Conditions

During a match, various Weather Conditions can appear during certain Turns and provide different effects while active. These can either work for or against you depending on your card's abilities or current status. Keep the current Weather Conditions in mind when planning your next move.

Face Off Against New and Old Friends

HSR Cosmicon Roll On - Face Off Against New and Old Friends

During the event, you can engage in card battles against new friends from Planarcadia, as well as familiar faces that you've met at the previous stops of your journey. Once you've finished the event's story, you can even challenge other Trailblazers in Free Co-Op mode!

Cosmicon, Roll On Event Rewards

Get a 4-Star Character of Your Choice

HSR Cosmicon Roll On - Claim a Free 4-Star Character

Unlike the previous Fateful Crossing rewards which had a restricted character pool, the reward for completing this event will allow you to choose any of the 4-star characters currently available in the game.

List of All 4 Star Characters

Unlock a New Fashion Item

HSR Cosmicon Roll On - New Trailblaze Fashion

Playing Cosmicon, Roll On and reaching Experience Level 23 will reward players with the Ah! Youth! Trailblaze Fashion cosmetic to equip on their Trailblazer!

All Trailblaze Fashion Cosmetics

Cosmicon, Roll On Total Rewards

Cosmicon, Roll On Rewards
Star Rail - Self-Modeling Resin Item Self-Modeling Resin x1 Star Rail - Tracks of Destiny Item Tracks of Destiny x2 Star Rail - Stellar Jade Item Stellar Jade x1,500
Star Rail - Traveler Traveler's Guide x62 Star Rail - Refined Aether Item Refined Aether x59 Star Rail - Lost Crystal  Item Lost Crystal x73
Star Rail - The Fluffy Serialization Memorial Issue Item The Fluffy Serialization Memorial Issue x60 Star Rail - Credit Item Credit x1,200,000 Star Rail - Trailblaze EXP Item Trailblaze EXP x2,200

Limited-Time Rewards

Objective Rewards
Card Game Anecdotes
Star Rail - Credit Item Credit x80,000
Players' Collection
Star Rail - Credit Item Credit x300,000
Dice Player One
Star Rail - Credit Item Credit x180,000
Street Dicer
Star Rail - Credit Item Credit x80,000
Complete all limited-time missions

Regular Rewards

Experience Level Rewards

Lv. Rewards
1
Star Rail - Credit Item Credit x20,000
+ Power Token x1
2
Star Rail - Credit Item Credit x20,000
+ Power Token x1
3
Star Rail - Credit Item Credit x20,000
+ Power Token x1
4
Star Rail - Credit Item Credit x20,000
+ Power Token x1
5
Star Rail - Credit Item Credit x20,000
+ Power Analyst Certificate x1
6
Star Rail - Credit Item Credit x20,000
+ Power Token x1
7
Star Rail - Credit Item Credit x20,000
+ Power Token x1
8
Star Rail - Credit Item Credit x20,000
+ Power Token x1
9
Star Rail - Credit Item Credit x20,000
+ Power Token x1
10
Star Rail - Credit Item Credit x20,000
+ Sparxie Cosmicon Collective Card
11
Star Rail - Credit Item Credit x20,000
+ Power Token x1
12
Star Rail - Credit Item Credit x20,000
+ Power Token x1
13
Star Rail - Credit Item Credit x20,000
+ Power Token x1
14
Star Rail - Credit Item Credit x20,000
+ Power Token x1
15
Star Rail - Credit Item Credit x20,000
16
Star Rail - Credit Item Credit x20,000
+ Power Token x1
17
Star Rail - Credit Item Credit x20,000
+ Power Token x1
18
Star Rail - Credit Item Credit x20,000
+ Power Token x1
19
Star Rail - Credit Item Credit x20,000
+ Power Token x1
20
Star Rail - Credit Item Credit x20,000
21
Star Rail - Credit Item Credit x20,000
+ Power Token x1
22
Star Rail - Credit Item Credit x20,000
+ Power Token x1
23
Star Rail - Credit Item Credit x20,000
24
Star Rail - Credit Item Credit x20,000
+ Power Token x1
25
Star Rail - Credit Item Credit x20,000

As you challenge story opponents, you can obtain Collective Experience used to raise your Experience Level. Each level that you reach unlocks more rewards to claim!

Event Mission Rewards

Mission Rewards
Ballad of the Moles: Mogura Invasion
Star Rail - Credit Item Credit x30,000
Ballad of the Moles: The Formidable Four
Star Rail - Credit Item Credit x30,000

The rewards shown above come from completing the missions tied to the event's story.

Cosmicon, Roll On Achievements

Achievement and How to Unlock Rewards
Those Golden Days of Youth
Complete all Cosmicon, Roll On! story battles
Honkai: Star Rail - Stellar Jade x5
Bully the Weak Today
Defeat Hook in "Cosmicon, Roll On!"
Honkai: Star Rail - Stellar Jade x5
Dicing the Streets
Defeat "the Formidable Four" in "Cosmicon, Roll On!"
Honkai: Star Rail - Stellar Jade x5

There are 3 Cosmicon, Roll On achievements that can be unlocked. You can get most of these naturally as you play through the event!

List of All Achievements

Battle Pass Rewards

Objective Reward
Defeat Hook in the "Cosmicon, Roll On!" story
Honkai Star Rail - The Nameless EXP x2,100
Obtain 8 three-star cards in total in "Cosmicon, Roll On!"
Honkai Star Rail - The Nameless EXP x1,400

You can get a total of 3,500 Nameless EXP when you complete the objectives above. This will aid in advancing your Battle Pass to get more rewards from it!

Nameless Honor Battle Pass Guide

Honkai: Star Rail Related Guides

Honkai Star Rail - Events Banner
All Events and Schedules

Current Events

All Honkai: Star Rail Current Events
Honkai Star Rail - Cosmicon Roll On Event Guide Cosmicon, Roll On!
02/13/2026 - 03/23/2026
Honkai Star Rail - Ding Arcadia Fun-Time Clock-In Essentials  Event Guide Ding! Arcadia Fun-Time Clock-In Essentials
02/13/2026 - 03/23/2026
Honkai Star Rail - Free 5-Star Character Version 4.0Free 5-Star Selector
02/13/2026 - End of 4.2
Honkai Star Rail - A Flip of Fortune Event Guide A Flip of Fortune
02/13/2026 - 03/25/2026
Honkai Star Rail - Gift of Arcadia Event Guide Gift of Arcadia
02/13/2026 - 03/25/2026
Honkai Star Rail - Novaflare Event GuideNovaflare
02/13/2026 - 03/25/2026
Honkai Star Rail - Aptitude Showcase Aptitude Showcase
02/13/2026 - 03/03/2026
Honkai Star Rail - Gift of Odyssey Gift of Odyssey
02/13/2026 - 03/24/2026
Honkai Star Rail - Come With Me, Take the Journey Web Event GuidePlayer Return Event
02/13/2026 - 03/25/2026
Honkai Star Rail - Pact of Permansor TerraePact of Permansor Terrae
10/15/2025 - End of 4.0
Honkai Star Rail - Free 5-Star Character in Version 3.7Stellar Companions
11/05/2025 - End of 4.0

Upcoming Events

All Honkai: Star Rail Upcoming Events
Honkai Star Rail - Planar Fissure Event Guide4.0 Planar Fissure
02/23/2026 - 03/09/2026
Honkai Star Rail - Realm of the Strange Event Guide4.0 Realm of the Strange
03/13/2026 - 03/23/2026

Conventional Memoir Events

Honkai: Star Rail Conventional Memoir Events
Honkai Star Rail - Boulder Town Super League Event GuideBoulder Town Super League Honkai Star Rail - Everwinter City Museum Ledger of Curiosities Event GuideEverwinter City Museum
Honkai Star Rail - Tales of the Fantastic Event GuideTales of the Fantastic Honkai Star Rail - Aurum AlleyAurum Alley Hustle & Bustle
Honkai Star Rail - Aetherium Wars Event GuideAetherium Wars Honkai Star Rail - A Foxian Tale of the Haunted Ghost Event GuideA Foxian Tale of the Haunted
Honkai Star Rail - Boulder Town Martial Exhibition Event GuideBoulder Town Martial Honkai Star Rail - Critter Pick Event GuideCritter Pick
Honkai Star Rail - HanuHanu's Prison Break Honkai Star Rail - Vignettes in a Cup Event GuideVignettes in a Cup
Honkai Star Rail - Clockie Dreamjoy Memoir Event GuideClockie: Dreamjoy Memoir Honkai Star Rail - Origami Bird Clash Event GuideOrigami Bird Clash
Honkai Star Rail - Saga of Primaveral Blade Event GuideSaga of Primaveral Blade Honkai Star Rail - Luminary Wardance Event GuideLuminary Wardance
Honkai Star Rail - Festive Revelry Event GuideFestive Revelry Honkai Star Rail - Sound Hunt Ninjutsu Inscription Event GuideSound Hunt Ninjutsu Inscription
Honkai Star Rail - Cosmic Home Decor Guide EventCosmic Home Decor Guide Honkai Star Rail - Hypogeum Enigma Event GuideHypogeum Enigma
Honkai Star Rail - The Awooo Firm Event GuideThe Awooo Firm Seal Slammers Top Banner Seal Slammers
Honkai Star Rail - Legend of the Galactic Baseballer Demon King Event Guide Legend of the Galactic Baseballer: Demon King Honkai Star Rail - Origami Bird Clash Official Edition Event GuideOrigami Bird Clash: Official Edition
Honkai Star Rail - Fate stay night Holy Grail War Event GuideFate/stay night (Holy Grail War) Honkai Star Rail - The Chrysos Maze Grand Restaurant Event GuideChrysos Maze Grand Restaurant
Honkai Star Rail - Nice Weather For DromasesNice Weather for Dromases Honkai Star Rail - Snack DashSnack Dash
Honkai Star Rail - Chrysos Awoo Championship Event Guide Chrysos Awoo Championship Honkai Star Rail - Remnants of Twilight Event Guide Remnants of Twilight

Permanent Events

All Honkai: Star Rail Permanent Events
Honkai Star Rail - Trailblazing Will Event Guide Trailblazing Will Honkai Star Rail - Starkissed Synchrony Event GuideStarkissed Synchrony
Honkai Star Rail - When Charmony Rings Out Event GuideWhen Charmony... Honkai Star Rail - Starlit Homecoming Event Guide Starlit Homecoming

Comment

1 Anonymous Anonymous 16 days

There is too much waiting for the bot to roll it’s so annoying

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