Hydra

Effect

Main DON!! −1 (You may return the specified number of DON!! cards from your field to your DON!! deck.): Give up to 1 of your opponent's Characters −3000 power during this turn.

Trigger

Trigger If your opponent has 6 or more DON!! cards on their field, your opponent returns 1 DON!! card from their field to their DON!! deck.