Blacephalon GX (219/214) [Sun & Moon: Lost Thunder] Cyberse Set: The Infinity Chasers Card

Set: The Infinity Chasers Card type: Effect Monster Rarity: Super Rare Attack: 0 Defense: 2000 During the Main Phase (Quick Effect): You can Tribute this card

it is unaffected by activated effects from any monster whose original Level/Rank is lower than this card's current Level

You can remove all Wedge Counters from your opponent's monsters to reduce the ATK and DEF of each monster that had Wedge Counters to 0

Monsters cannot be Special Summoned from the Main Deck

Then you can Special Summon WATER monsters from your hand

Blacephalon GX (219/214) [Sun & Moon: Lost Thunder] Cyberse Set: The Infinity Chasers CardSet: Sun & Moon: Lost Thunder Type: Fire Rarity: Secret Rare Retreat cost: Colorless,Colorless