Savai Thundermane is a uncommon Creature — Elemental Cat card from Ikoria: Lair of Behemoths (IKO), collector number 205. Current market price: $0.14 (foil $0.24), TCGplayer market prices via Scryfall.
Whenever you cycle a card, you may pay {2}. When you do, this creature deals 2 damage to target creature and you gain 2 life.