Nightmare: Thundering Mephis

Overlord Cost 4 Cooldown 25s Void Thunder

A Cost-4 Overlord Echo with a 25s cooldown. It belongs to the Void Thunder set.

Buffs+12% Electro DMG Bonus · +12% Resonance Liberation DMG Bonus

Echo Skill

Transform into Nightmare: Thundering Mephis and attack enemies in front, dealing 405% Electro DMG. The Resonator with this Echo equipped in their main slot gains 12.00% Electro DMG Bonus and 12.00% Resonance Liberation DMG Bonus.

Set Effects

Void Thunder

2 Set	Electro DMG +10%.
5 Set	Upon using Heavy Attack or Resonance Skill, Electro DMG increases by 15%, stacking up to 2 times, each stack lasting for 15s.

Used by: Xiangli Yao, Calcharo, Lumi.

Last updated: 29 July 2026