Welcome to the Fold is a rare Sorcery card from Shadows over Innistrad (SOI), collector number 96. Current market price: $0.22 (foil $0.42), TCGplayer market prices via Scryfall.
Madness {X}{U}{U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) Gain control of target creature if its toughness is 2 or less. If this spell's madness cost was paid, instead gain control of that creature if its toughness is X or less.