Thundering Mephis is an Echo that can be equipped by your Resonators in Wuthering Waves. Scroll down and read more to learn Thundering Mephis's stats, class, cost, Echo Ability, Sonata Effects, and how to get it!
Thundering Mephis Overview
Class, Cost, and Echo Ability
 Thundering Mephis | Class: Overlord |
| Cost: 4 | |
| Echo Ability Transform into Thundering Mephis, engaging in a rapid assault of up to 6 strikes. The first 5 strikes deal 50%* Electro DMG each, while the final strike inflicts 249%* Electro DMG, with an additional 41%* Electro DMG from the thunder. After the final hit, increase the current character’s Electro DMG by 12% and Resonance Liberation DMG by 12% for 15s. Skill Cooldown: 25s | |
NOTE: You can equip up to five Echoes on a Resonator as long as they meet your current Cost limit, but they can only use the Echo Ability of the Echo they have equipped on their 1st slot. Your Echoes' Cost limit, drop rate, and class are all determined by your Data Bank's Terminal Level.
Possible Sonata Effects
Here are the Sonata Effects that you can potentially get upon acquiring a copy of Thundering Mephis:
 Void Thunder |
| 2-set effect: Electro damage is increased by 10% |
| 5-set effect: When releasing Heavy Attack or Resonance Skill, Electro damage dealt is increased by 15%, stacking up to two times, each lasting for 15 seconds. |
Possible Main Stats & Substats
Here are the potential stat boosts that a copy of Thundering Mephis can provide your Resonators with:
| Main Stats Thundering Mephis | Random: HP%, ATK%, DEF% , Crit Rate%, Crit DMG%, Healing Bonus% |
| Fixed: ATK | |
| Substats Thundering Mephis | Random: HP, HP%, ATK, ATK%, DEF, DEF%, Basic Attack DMG Bonus%, Heavy Attack DMG Bonus%, Resonance Skill DMG Bonus%, Resonance Liberation DMG Bonus, Crit Rate%, Crit DMG% |
How to Get Thundering Mephis
World Map
You can get this Echo by defeating the Thundering Mephis boss and absorbing its reverberation.
Go to this map location [Huanglong-Desorock Highland-Withering Frontline] specifically to see the Thundering Mephis boss:
NOTE: You can absorb Echoes of Calamity-class and Overlord-class Tacet Discords without spending your Waveplates by not claiming the rewards after you defeat them.
Thundering Mephis Rewards
Aside from its Echo, here are all the rewards you can get by defeating the Thundering Mephis and spending 60 Waveplates after the battle:
| Thundering Mephis Rewards (First Clear) | Quantity |
|---|---|
 Union EXP | x500 |
 Astrite | x20 |
 Advanced Resonance Potion | x1 |
 Advanced Energy Core | x1 |
 Shell Credits | x12,000 |
| Thundering Mephis Rewards (Subsequent Clears) | Quantity |
|---|---|
Union EXP | x450 |
 Thundering Tacet Core | Depends on Current Sol3 Phase |
 Medium Sealed Tube | Depends on Current Sol3 Phase |
 Medium Resonance Potion | Depends on Current Sol3 Phase |
 Medium Energy Core | Depends on Current Sol3 Phase |
 Intimacy | Depends on Current Sol3 Phase |
Shell Credits | Depends on Current Sol3 Phase |
Best Resonators for Thundering Mephis
Here's a list of Resonators that you should consider equipping with Thundering Mephis's Echo:
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