How to beat Collei in Part 4 of Zero Hour Invokation in Genshin Impact's 3.7 Phase 1 event, Duel! The Summoners' Summit! can be found here. See the best cards and decks to use, strategy and rotations, Part 4 details, and all rewards by reading on!

Zero Hour Invokation Event Guides
Part 1	Part 2	Part 3	Part 4

How to Beat Zero Hour Invokation: Part 4

Best Cards Against Collei

The Spreading Swirl Deck

Main Character Cards
Nahida	Yae Miko	Sucrose

The key to winning the final part of Zero Hour Invokation is a highly overlooked mechanic that not a lot of people are likely aware of: Elemental Reaction combos.

It is already evident by the recommended cards in this duel that it will be centered around Elemental reactions, but the lineup above will give you a different perspective on how to chain several Elemental Reactions together to dish out maximum DMG!

Strategy and Rotation

Elemental Reaction Combos

This time around, we'll be paying close attention not just to card combinations, but Elemental Reaction combos provided by both Swirl and Quicken reactions!

It is imperative that you have a basic understanding of how each Elemental Reaction works, especially Swirl. Not only will it hit multiple targets at once, the key thing to remember is how it spreads elements around, providing potential chain reactions.

Plant Your Seeds!

Apart from Swirl and Quicken, it's also important to know what your character cards are capable of. In this case, one of your biggest game-changers is Nahida's Elemental Skill, All Schemes to Know: Tathata.

Start with Nahida when the battle begins. Before anything else, be sure to use this Skill to plant Seeds of Skandha to all of Collei's cards. They will be triggered whenever an Elemental Reaction takes place, damaging all targets they are attached to.

The Elemental Chain Reaction

Now comes the satisfying part. Switch to Yae Miko and set her Electro summons up. Swap to Sucrose before ending your round. Once the next round begins, cast Sucrose's Elemental Burst and trigger Swirl, spreading Electro all around.

What will happen after the Swirl is Electro will pass onto Collei's stand-by characters and trigger a Quicken reaction, increasing DMG. Since we have the Seeds of Skandha planted, they will be triggered twice, and two rounds of DMG will ensue!

Serious Showdown Strategy

Prioritize Cyno

Cyno will be Collei's main DPS in this game, and for good reason. He will be able to dish out extreme DMG if you leave him active for too long, so take him out first. After Cyno, focus on Kokomi next so as to not drag the battle longer than it should.

Zero Hour Invokation: Part 3 Stage Information

Revived Serval: Collei

Collei's Character Cards

Main Character Cards
Collei	Cyno	Kokomi

Collei plays strategically, balancing both DMG output and survival equally. Be sure to know which ones to prioritize, and brace for impact whenever she switches to Cyno!

Should your dice be unusable, do not hesitate to use Elemental Tuning to ensure you can follow through with your strategy.

Part 4 Location

Part 4 of all Event activities, including Zero Hour Invokation, is located in Sumeru. They are at the tavern terrace at the soutwest docks of Port Ormos.

Special Rules

Rule	Description
Energy Supply	At the start of the first Action Phase, both players will get 2 charges of Energy for all Character Cards.
Dice Cost Decrease	In each round, the cost for the first Action Card each player uses will be decreased by 2.

Character Cards Options

All Part 4 Character Cards
Nahida	Tighnari	Kamisato Ayato	Tartaglia
Hu Tao	Yae Miko	Fatui Cryo Cicin Mage	Sucrose

Zero Hour Invokation: Part 4 Rewards

All Part 4 Rewards

Objectives	Rewards
Complete a duel with this player at any difficulty	Invokation Coupons x200 Primogem x30 Mora x40000
Complete a duel with this player at any difficulty and achieve victory	Invokation Coupons x100 Mora x40000 Hero's Wit x2
Complete a duel with this player on "Serious Showdown" difficulty	Mora x20000 Mystic Enhancement Ore x4

Zero Hour Invokation: Part 4 Event Information

"Duel! The Summoners' Summit!" Event

Zero Hour Invokation is a TCG battle minigame in the ''Duel! The Summoners' Summit!'' event for Phase 1 of Genshin Impact 3.7!

There will be 4 stages of this event in total, and each will unlock on separate dates.
All Zero Hour Invokation Guides

Genshin Impact Related Guides

Duel! The Summoner's Summit! Guide

Duel! The Summoners' Summit! Sub-Events

Duel! The Summoners' Summit! Event Guides
A Tour of Wonders	Zero Hour Invokation	Evermotion Painting 3.7	Heart of the Dice

Evermotion Mechanical Painting: Invoker Guides

Invoker Guides
Mondstadt	Liyue	Inazuma	Sumeru

3.7 Evermotion Painting: Invoker Guide

A Tour of Wonders Guides

Tour of Wonders Guides
Part 1	Part 2	Part 3	Part 4

A Tour of Wonders Event Guide

Zero Hour Invokation Guides

Zero Hour Invokation Guides
Part 1	Part 2	Part 3	Part 4

Zero Hour Invokation Event Guide

Heart of the Dice Guides

Dice Stratagem Guides
Part 1	Part 2	Part 3	Part 4

Heart of the Dice Event Guide

Character Locations for TCG Event

3.7 Character Locations for TCG Event

Duel! The Summoners' Summit! Quest Guides

Duel! The Summoners' Summit! Event Quests
Commence! A Suspect Genesis	Roll! A Sea of New Acquaintances
Cards Out! Grievances Begone	Culminate! Chatter of Joyous Dreams

Other Related Genius Invokation Guides

Genius Invokation TCG Guides
Genius Invokation Gameplay	Card Elemental Reactions
Basics of Elemental Dice	Beginner's Tutorial Quest

All Genshin Impact Events

List of Events