Thermal Expansion and Contraction is the seventh challenge in the Endless Forms Most Martial event in Genshin Impact 4.7. See how to beat Thermal Expansion and Contraction, best team to use, challenge details, and rewards here!

Endless Forms Most Martial Guides
Stage 1	Stage 2	Stage 3	Stage 4
Stage 5	Stage 6	Stage 7	Stage 8

How to Beat Thermal Expansion and Contraction Challenge

Best Team for Thermal Expansion and Contraction

Main DPS	Sub-DPS	Sub-DPS	Support
Ganyu	Xiangling	Bennett	Zhongli
Lyney	Ganyu	Sucrose	Layla

For the seventh stage of Endless Forms Most Martial, form a team capable of triggering the Melt reaction. Bringing characters who can consistently apply Cryo and Pyro is needed for this round.

When forming a team with the trial characters, make sure to include another Pyro applicator and a support character, such as Zhongli or Diona, who can create a shield to keep Ganyu from being interrupted as she executes her charged attacks.

Melt Reaction Guide

Defeat Opponents Within 3 Seconds of Triggering Melt

Use Characters That Consistently Apply Cryo and Pyro

Bring characters that can reliably apply Pyro and Cryo to trigger the Melt reaction. To progress through the challenge, make sure to trigger the Melt reaction on enemies within 3 seconds before defeating them. Try to trigger the reaction when their HP is low to meet the objective.

Apply Cryo to Enemies Before Entering Phase Shift

Continuously triggering reaction will also allow you to enter Phase Shift, which when activated will unleash an AoE Pyro DMG, therefore make sure that the enemies are affected by Cryo so that the Melt reaction can be immediately triggered!

Best Characters for Stage 7

Best Characters by Role

Main DPS
Sub DPS
Support

Cryo and Pyro characters are ideal for this round to trigger the Melt reaction and complete the challenge.

Best Team Comp Guide

Thermal Expansion and Contraction Challenge Information

Thermal Expansion and Contraction Challenge Details

Trial Characters and Builds

Character	Trial Character Build
Ganyu (Lvl. 80)	Prototype Crescent (Lvl. 80 - R1)
	Blizzard Strayer (4 pc.)
	Notable Stats • ATK: 2,091 • Elemental Mastery: 105 • CRIT Rate: 57.1% • CRIT DMG: 120.7% • Energy Recharge:135% • Cryo DMG Bonus: 96.6%
Xiangling (Lvl. 80)	Dragon's Bane (Lvl. 80 - R1)
	Noblesse Oblige (2 pc.) Crimson Witch of Flames (2 pc.)
	Notable Stats • ATK: 1,541 • Elemental Mastery: 378 • CRIT Rate: 57.1% • CRIT DMG: 91.9% • Energy Recharge: 135% • Pyro DMG Bonus: 96.6%

Thermal Expansion and Contraction Enemies

List of Enemies
Assault Specialist Mek Suppression Specialist Mek Eremite - Stone Enchanter Nobushi: Jintouban

Part of Endless Forms Most Martial Event

Thermal Expansion and Contraction is Stage 7 of the Endless Forms Most Martial event. In this challenge, players must defeat 10 enemies within 3s of triggering Melt.

Endless Forms Most Martial Event Guide

Thermal Expansion and Contraction Challenge Rewards

Stage 7 Rewards

Objectives	Rewards
Complete Challenged on “Relaxed” or higher difficulty	Primogem x60 Sanctifying Unction x2
Complete Challenged on “Temperamental” or higher difficulty	Mora x20000 Hero's Wit x3
Complete Challenged on “Treacherous” difficulty	Mystic Enhancement Ore x3 Fine Enhancement Ore x6

Genshin Impact Related Guides

Endless Forms Most Martial Event Guide

Endless Forms Most Martial Stage Guides

Endless Forms Most Martial Stages
1 - Swelling Thermal Vortex	2 - Concentrated Cleaving Collapse
3 - Arcing Electric Surge	4 - Polarized Conduction Overload
5 - The Feeble, Felled by Frost	6 - Racked by Rending Rime
7 - Thermal Expansion and Contraction	8 - Self-Sharpening Sword

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