Gaea's Will is a rare Sorcery card from The List (PLST), collector number MH2-412. Current market price: $0.41, TCGplayer market prices via Scryfall.
Suspend 4—{G} Until end of turn, you may play lands and cast spells from your graveyard. If a card would be put into your graveyard from anywhere this turn, exile that card instead.