★ 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

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!
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| 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!

To unlock Cosmicon, Roll On event, players must complete the No Aha at Full Moon Trailblaze Mission!
No Aha at Full Moon Mission Guide
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
| Mogura Invasion Opponents | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Svarog |
Clara |
Serval |
|||||||||
Landau Family |
Julian |
Hook |
|||||||||
| The Formidable Four Opponents | |||||||||||
Sparxie |
Rappa |
Yao Guang |
Seele |
||||||||
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!
| Recommended Character Card |
|---|
Firefly |
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.
| Recommended Character Card |
|---|
Hyacine |
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.
| Character Card | Prismatic Die |
|---|---|
The Herta |
True 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.
| Character Card | Prismatic Die |
|---|---|
Acheron |
True 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.
| Character Card | Prismatic Die |
|---|---|
The Herta |
True 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.
| Character Card | Prismatic Die |
|---|---|
Phainon |
True 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.
| Character Card | Prismatic Die |
|---|---|
The Herta |
True 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.
| Character Card | Prismatic Die |
|---|---|
Castorice |
True 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.
| Character Card | Prismatic Die |
|---|---|
Castorice |
True 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.
| Character Card | Prismatic Die |
|---|---|
Firefly |
True 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.

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!

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!

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.

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!

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.

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!

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.

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 Rewards | ||
|---|---|---|
Self-Modeling Resin
x1 |
Tracks of Destiny
x2 |
Stellar Jade
x1,500 |
Traveler's Guide
x62 |
Refined Aether
x59 |
Lost Crystal
x73 |
The Fluffy Serialization Memorial Issue
x60 |
Credit
x1,200,000 |
Trailblaze EXP
x2,200 |
| Objective | Rewards |
|---|---|
| Card Game Anecdotes |
|
| Players' Collection |
|
| Dice Player One |
|
| Street Dicer |
|
| Complete all limited-time missions |
| Lv. | Rewards |
|---|---|
| 1 |
+ Power Token x1
|
| 2 |
+ Power Token x1
|
| 3 |
+ Power Token x1
|
| 4 |
+ Power Token x1
|
| 5 |
+ Power Analyst Certificate x1
|
| 6 |
+ Power Token x1
|
| 7 |
+ Power Token x1
|
| 8 |
+ Power Token x1
|
| 9 |
+ Power Token x1
|
| 10 |
+ Sparxie Cosmicon Collective Card
|
| 11 |
+ Power Token x1
|
| 12 |
+ Power Token x1
|
| 13 |
+ Power Token x1
|
| 14 |
+ Power Token x1
|
| 15 |
|
| 16 |
+ Power Token x1
|
| 17 |
+ Power Token x1
|
| 18 |
+ Power Token x1
|
| 19 |
+ Power Token x1
|
| 20 |
|
| 21 |
+ Power Token x1
|
| 22 |
+ Power Token x1
|
| 23 |
|
| 24 |
+ Power Token x1
|
| 25 |
|
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!
| Mission | Rewards |
|---|---|
| Ballad of the Moles: Mogura Invasion |
|
| Ballad of the Moles: The Formidable Four |
|
The rewards shown above come from completing the missions tied to the event's story.
| Achievement and How to Unlock | Rewards |
|---|---|
| Those Golden Days of Youth Complete all Cosmicon, Roll On! story battles |
|
| Bully the Weak Today Defeat Hook in "Cosmicon, Roll On!" |
|
| Dicing the Streets Defeat "the Formidable Four" in "Cosmicon, Roll On!" |
There are 3 Cosmicon, Roll On achievements that can be unlocked. You can get most of these naturally as you play through the event!
| Objective | Reward |
|---|---|
| Defeat Hook in the "Cosmicon, Roll On!" story | |
| Obtain 8 three-star cards in total in "Cosmicon, Roll On!" |
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
| All Honkai: Star Rail Current Events | |
|---|---|
Cosmicon, Roll On! 02/13/2026 - 03/23/2026 |
Ding! Arcadia Fun-Time Clock-In Essentials 02/13/2026 - 03/23/2026 |
Free 5-Star Selector 02/13/2026 - End of 4.2 |
A Flip of Fortune 02/13/2026 - 03/25/2026 |
Gift of Arcadia 02/13/2026 - 03/25/2026 |
Novaflare 02/13/2026 - 03/25/2026 |
Aptitude Showcase 02/13/2026 - 03/03/2026 |
Gift of Odyssey 02/13/2026 - 03/24/2026 |
Player Return Event 02/13/2026 - 03/25/2026 |
Pact of Permansor Terrae 10/15/2025 - End of 4.0 |
Stellar Companions 11/05/2025 - End of 4.0 |
|
| All Honkai: Star Rail Upcoming Events | |
|---|---|
4.0 Planar Fissure 02/23/2026 - 03/09/2026 |
4.0 Realm of the Strange 03/13/2026 - 03/23/2026 |
| All Honkai: Star Rail Permanent Events | |
|---|---|
Trailblazing Will |
Starkissed Synchrony |
When Charmony... |
Starlit Homecoming |
Cosmicon, Roll On Event Guide



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