Unquenchable Thirst is a common Enchantment — Aura card from Hour of Devastation (HOU), collector number 53. Current market price: $0.12 (foil $0.08), TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, if you control a Desert or there is a Desert card in your graveyard, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step.