Abyssal Overlord Liviata Thalasa Water

Max rarity ★6, 3 evolution forms. Skills and Lv99 stats are listed for each form.

Base: Leviata, Azure Tide (★5)

Active skill: Greater Tidal SurgeWater damage 6× (lasts 2 drops) ／ Target: all members who attack with that element ／ Stacking: damage-multiplier effects do not stack. If several are active at once, only the single highest one applies. It multiplies with your leader and sub-leader multipliers
Trigger: Triggers on 4-chain
Cooldown: 18 drops initially, down to 12 drops (Rechargeable)
Leader skill: Prismatic HarmonyEach element type in your party adds another 0.28× of damage (on top of the base 1×; reaches up to 3× at 8 types) ／ Combining: when the leader and sub-leader share the same effect, their multipliers multiply together. They also multiply with an active skill's damage multiplier (only the single highest one if several are active at once)
Lv99 stats: HP 8105 ATK 892 Heal 356

Active skill: Tidal OnslaughtWater damage 2.5× (lasts 2 drops) ／ Target: all members who attack with that element ／ Stacking: damage-multiplier effects do not stack. If several are active at once, only the single highest one applies. It multiplies with your leader and sub-leader multipliers
Trigger: Triggers on 4-chain
Cooldown: 18 drops initially, down to 12 drops (Rechargeable)
Leader skill: Prismatic HarmonyEach element type in your party adds another 0.28× of damage (on top of the base 1×; reaches up to 3× at 8 types) ／ Combining: when the leader and sub-leader share the same effect, their multipliers multiply together. They also multiply with an active skill's damage multiplier (only the single highest one if several are active at once)
Lv99 stats: HP 12968 ATK 1338 Heal 535

Active skill: Apex Tidal SurgeWater damage 10× (lasts 1 drops) ／ Target: all members who attack with that element ／ Stacking: damage-multiplier effects do not stack. If several are active at once, only the single highest one applies. It multiplies with your leader and sub-leader multipliers
Trigger: Triggers on 6-chain
Cooldown: 18 drops initially, down to 12 drops (Rechargeable)
Leader skill: Prismatic ResonanceEach element type you merge in one drop adds another 1.5× of damage, stacking on top of the base 1×, reaching up to 10× at 6 types (only on drops that also reach a 6+ chain) ／ Combining: when the leader and sub-leader share the same effect, their multipliers multiply together. They also multiply with an active skill's damage multiplier (only the single highest one if several are active at once)
Lv99 stats: HP 22288 ATK 2223 Heal 941