Titanbones, Towering Heart is a uncommon Legendary Creature — Skeleton Druid card from Reality Fracture (FRA), collector number 266. Current market price: $0.20 (foil $0.31), TCGplayer market prices via Scryfall.
Reach Whenever you gain life, put two +1/+1 counters on Titanbones. When you discard this card, you gain 3 life.