Unconventional Tactics is a uncommon Sorcery card from Hour of Devastation (HOU), collector number 27. Current market price: $0.19 (foil $0.18), TCGplayer market prices via Scryfall.
Target creature gets +3/+3 and gains flying until end of turn. Whenever a Zombie you control enters, you may pay {W}. If you do, return this card from your graveyard to your hand.