Deal Damage is a uncommon Instant card from Unhinged (UNH), collector number 74. Current market price: $0.32 (foil $2.49), TCGplayer market prices via Scryfall.
Deal Damage deals 4 damage to any target. Gotcha — If an opponent says "deal" or "damage," you may say "Gotcha!" When you do, return Deal Damage from your graveyard to your hand.