Thunder Drake Sovereign Stratos Tempest Wind

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

Base: Stratos, Storm Dragon (★5)

Active skill: Greater Tempest SurgeWind 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: Tempest InsightWind ATK 2× + 4+ chain damage 1.6× ／ Combining: an always-on effect. Both the leader and sub-leader apply at the same time
Lv99 stats: HP 7577 ATK 1004 Heal 238

Active skill: Great ChainAdds +4 to the next drop's chain count (bigger chain bonus) ／ Target: the board (the drop/chain itself) ／ Stacking: affects the board. The same type refreshes its duration. It does not change damage multipliers
Trigger: Triggers on 4-chain
Cooldown: 16 drops initially, down to 11 drops (Rechargeable)
Leader skill: Tempest InsightWind ATK 2× + 4+ chain damage 1.6× ／ Combining: an always-on effect. Both the leader and sub-leader apply at the same time
Lv99 stats: HP 12123 ATK 1505 Heal 356

Active skill: Apex Tempest SurgeWind 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: Rising TideMin falling jewel value +2 steps (1 step = ×2, always on) — fewer small jewels ／ Combining: an always-on effect. Both the leader and sub-leader apply at the same time
Lv99 stats: HP 20836 ATK 2501 Heal 627