High Tide on Fire Island

If you control a Level 7 or higher WATER or FIRE monster: Apply the appropriate effects, in sequence, depending on the Attributes of monsters you control at that time.
●WATER: Special Summon as many WATER monsters as possible that were sent to your Graveyard to activate monster effects this turn, then destroy 1 monster you control.
●FIRE: Destroy 1 monster on the field, then if you have any cards in your hand, discard 1 card to the Graveyard.