Herd Migration is a rare Sorcery card from Dominaria United (DMU), collector number 413. Current market price: $0.32 (foil $0.37), TCGplayer market prices via Scryfall.
Domain — Create a 3/3 green Beast creature token for each basic land type among lands you control. {1}{G}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 3 life.