Frostveil Ambush is a common Instant card from Ikoria: Lair of Behemoths (IKO), collector number 52. Current market price: $0.17 (foil $0.36), TCGplayer market prices via Scryfall.
Tap up to two target creatures. Those creatures don't untap during their controller's next untap step. Cycling {1} ({1}, Discard this card: Draw a card.)