Gutterbones is a rare Creature — Skeleton Warrior card from Ravnica Allegiance (RNA), collector number 76. Current market price: $0.35 (foil $1.84), TCGplayer market prices via Scryfall.
This creature enters tapped. {1}{B}: Return this card from your graveyard to your hand. Activate only during your turn and only if an opponent lost life this turn.