Thundering Mephis
Wuthering Waves hasn't published a danger class (Calamity/Overlord/Elite) for this echo in the official data we have — no guessing, no made-up label.
Echo Skill
Transform into Thundering Mephis, engaging in a rapid assault of up to 6 strikes. The first 5 strikes deal 132.61% Electro DMG each, while the final strike inflicts 189.44% Electro DMG, with an additional 31.57% Electro DMG from the thunder. After the final hit, increase the current character's Electro DMG by 12.00% and Resonance Liberation DMG by 12.00% for 15s. CD: 20s
Cooldown: 20s
Where to Farm
Dropped by: Thundering Mephis Overlord Class
Sonata sets
Void Thunder
Void Thunder2-PieceElectro DMG + 10%.
5-PieceElectro DMG + 15% after releasing Heavy Attack or Resonance Skill. This effect stacks up to 2 times, each stack lasts 15s.
Void Thunder →More Electro echoes
Echoes→
Echo sets→
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