Introduction to Thundering Mephis Guide

Wuthering Waves Thundering Mephis Guide: The Thundering Mephis is a formidable Overlord-Class Electro Tacet Discord, wielding immense control over thunder and lightning. Defeating this boss is essential for acquiring exclusive ascension materials required to enhance your Resonators. Additionally, its Echo serves as a powerful asset, particularly benefiting Electro DPS characters by amplifying their offensive capabilities. It is important to note that the Thundering Mephis, despite its similar name, is distinct from the Tempest Mephis and drops unique materials. Understanding this difference ensures you target the correct enemy for the resources you need.

Location

The Thundering Mephis resides in the Withering Frontline area of the Desorock Highland region, positioned in the northern section of the map. This crater-like battlefield lies just north of the Central Plains and Jinzhou, making it a prominent landmark. A Resonance Beacon is conveniently placed nearby, providing quick access to the fight. The most efficient approach is to teleport to the Resonance Beacon situated on the cliffs southwest of the boss’s location, then glide northeast to descend directly into the arena. This strategic entry ensures a swift and safe arrival, allowing you to engage the Thundering Mephis without unnecessary detours.

Combat Strategy

The Thundering Mephis is a highly agile Electro-based boss with increased resistance to Electro damage, making team composition crucial for maximizing damage output. This fight demands precise dodging, parrying, and positioning to counter its fast-paced attacks and unpredictable teleportation patterns.

Parrying – The Key to Victory

Effective Counterplay: Most of the Thundering Mephis’s attacks can be parried, allowing you to stay aggressive while reducing incoming damage.

Melee Resonators Recommended: Melee characters are best suited for this strategy, as they can remain close to the boss and capitalize on frequent parrying opportunities.

Close-Range Advantage: Staying near the boss increases the chances of successfully parrying its attacks, preventing it from gaining the upper hand.

Teleportation Mechanics

Constant Movement: The Thundering Mephis frequently teleports, often reappearing behind you or outside your field of view.

Camera Control: Quickly adjusting your camera helps track its location and avoid surprise attacks.

Timing-Based Dodging: With experience, you can predict its teleportation timing and dodge instinctively.

Parrying Teleport-Dash Attacks: The boss’s teleport-dash attacks are parryable but have a shorter reaction window, requiring precise timing.

Anticipating Attacks

Immediate Aggression: At the start of the fight, the boss will teleport toward you and attack immediately—be ready to evade or counter.

Counterattack Opportunity: When the boss charges a powerful attack, two white circles will appear—strike when they align to trigger a counterattack.

Ranged Attacks

Aerial Lightning Beam: If the Thundering Mephis flies upward, it will unleash a concentrated lightning beam. Dodge to the side to avoid damage.

Ground Lightning Sweep: When standing still and raising its weapon, it prepares a lightning beam that travels across the battlefield. Stay mobile to avoid getting hit.

Post-Attack Vulnerability: After executing these ranged attacks, the boss briefly slows down, walking across the battlefield—use this opening to deal damage.

Immobilization Strategy

Intro Skills for Control: Use your team’s Intro Skills as soon as they are available to quickly deplete the boss’s vibration strength.

Parrying to Weaken: Successfully parrying attacks also contributes to lowering its vibration strength, leading to a state of immobilization.

Optimal Positioning

Stay in the Center: Fighting near the middle of the arena prevents the boss from resetting its health, ensuring a smoother and faster battle.

Recommended Team Composition

When preparing to face the Thundering Mephis, selecting the right team composition is crucial for maximizing damage and survivability. Due to its resistance to Electro damage, it is best to avoid Electro Resonators and instead focus on melee and non-Electro damage dealers.

Main DPS: A strong melee character is recommended as your primary damage dealer, as they can effectively capitalize on parrying opportunities and maintain consistent pressure. Resonators such as Jiyan, Rover, Lingyang, and Danjin excel in this role due to their high burst potential and sustained melee damage.

Secondary DPS/Buffer: A secondary DPS or buffer can enhance your main damage dealer’s performance by increasing their output or providing additional offensive support. Resonators like Sanhua, Mortefi, and Jianxin contribute valuable buffs and supplementary damage to maintain a steady offensive presence.

Healer: Sustained healing is essential to counter the boss’s relentless attacks. Verina and Baizhi are strong healer choices that can provide continuous support, keeping the team in fighting condition throughout the encounter.

By assembling a well-balanced team that focuses on melee damage, supportive buffs, and reliable healing, you can effectively counter the Thundering Mephis’s strengths and secure a decisive victory.

Thundering Mephis Echo

Defeating the Thundering Mephis grants a chance to obtain its Echo, which enhances Electro-based characters with powerful offensive bonuses.

Echo Drop Reward: Hidden Thunder Tacet Core.
Cost: 4.
Secondary Main Stat: Flat ATK.
Resonance: Void Thunder.

Echo Ability

The Thundering Mephis Echo allows the user to temporarily transform into the boss, performing a shuttle attack that can be used up to six times. The first five hits deal a percentage of damage, while the final strike inflicts Electro damage with additional thunder effects. After the final hit, the current character’s Electro damage and Resonance Liberation damage increase by 12% for 15 seconds. This ability has a 25-second cooldown.

Primary Main Stats

The primary main stats are randomly assigned, but optimizing for ATK% is recommended for maximizing damage output. Other possible stats include HP%, DEF%, Crit Rate%, Crit DMG%, and Healing Bonus%, allowing for some flexibility based on playstyle and character needs.

Sonata Effects – Void Thunder

2-Piece Set Bonus: Increases Electro DMG by 10%.
5-Piece Set Bonus: After using a Heavy Attack or Resonance Skill, Electro DMG increases by 15%. This effect can be stacked twice, with each stack lasting 15 seconds.

Recommended Characters

The Thundering Mephis Echo is best suited for Electro Resonators, as it enhances Electro damage output and complements Resonance Liberation abilities.

Phantom Echo Acquisition

Phantom: Thundering Mephis can be obtained in the Points Shop under the Simulation Training Store for 300 Data Sets after accumulating 2,500 Data Sets in total.

By equipping the Thundering Mephis Echo, Electro-based characters gain significant offensive boosts, making it a valuable asset for enhancing Electro DPS playstyles.

Rewards

Defeating the Thundering Mephis allows you to claim valuable rewards by spending 60 Waveplates. The quality and quantity of these rewards are influenced by your SOL3 level, making higher levels more rewarding.

Standard Rewards

Each victory grants the following:

Union EXP ×450 – Progresses your overall account level.
Intimacy – Increases affinity with Resonators.
Shell Credits – The in-game currency used for various upgrades.
Thundering Tacet Core – A key material for character ascension.
Resonance Potions – Enhances Resonators’ abilities.
Energy Cores – Used for Resonator upgrades and enhancements.
Sealed Tubes – Essential for advancing Resonator skills.

First-Time Clear Rewards

For your first victory against the Thundering Mephis, you will receive additional rewards:

Union EXP ×500 – A larger boost for leveling up.
Astrite ×20 – A premium currency used for gacha pulls and special purchases.
Advanced Resonance Potion – A stronger version of the standard potion for Resonator enhancement.
Advanced Energy Core – Provides greater energy for Resonator progression.
Shell Credit ×12,000 – A significant boost to in-game currency reserves.

These rewards make the Thundering Mephis a valuable target for farming, especially for those looking to strengthen their Resonators with essential materials and currency.

Key Considerations

When preparing for the battle against the Thundering Mephis, keep these important factors in mind to maximize efficiency and ensure a smooth fight.

Electro Resistance: The Thundering Mephis has a high resistance to Electro damage, making Electro Resonators less effective in this encounter. It is best to use characters with other damage types to ensure consistent output.

Parrying is Key: Mastering parrying is essential for countering the boss’s fast-paced attacks. A well-timed parry not only mitigates damage but also provides opportunities to stay on the offensive.

Separate Bosses: Despite their similar names, the Thundering Mephis and Tempest Mephis are entirely different bosses. They have distinct abilities and drop different materials, so be sure to target the correct one when farming for specific resources.

Waveplates Requirement: After defeating the Thundering Mephis, you must spend 60 Waveplates to claim your rewards. Make sure you have enough before engaging in battle to avoid missing out on valuable materials.

Keeping these key considerations in mind will help you approach the fight strategically, optimize your team composition, and efficiently farm the necessary rewards.