Kashi-Tribe Reaver is a uncommon Creature — Snake Warrior card from Champions of Kamigawa (CHK), collector number 220. Current market price: $0.17 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step. {1}{G}: Regenerate this creature.