Entangling Trap is a uncommon Enchantment card from Lorwyn (LRW), collector number 13. Current market price: $0.23 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever you clash, tap target creature an opponent controls. If you won, that creature doesn't untap during its controller's next untap step. (This ability triggers after the clash ends.)