Smelt-Ward Gatekeepers is a common Creature — Human Warrior card from Dragon's Maze (DGM), collector number 39. Current market price: $0.17 (foil $0.17), TCGplayer market prices via Scryfall.
When this creature enters, if you control two or more Gates, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn.