tribal, merfolk (3)
Put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it. If you control a Merfolk, draw a card.
At the beginning of your end step, untap all Merfolk you control.
Create two 1/1 blue Merfolk Wizard creature tokens.
Tap four untapped Merfolk you control: Return Summon the School from your graveyard to your hand.
Gatherer works better in the Companion app!