Summon the School is a uncommon Kindred Sorcery — Merfolk card from Lorwyn (LRW), collector number 42. Current market price: $0.33 (foil $3.16), TCGplayer market prices via Scryfall.
Create two 1/1 blue Merfolk Wizard creature tokens. Tap four untapped Merfolk you control: Return this card from your graveyard to your hand.