Venarian Gold is a common Enchantment — Aura card from Legends (LEG), collector number 83. Current market price: $0.38, TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, tap enchanted creature and put X sleep counters on it. Enchanted creature doesn't untap during its controller's untap step if it has a sleep counter on it. At the beginning of the upkeep of enchanted creature's controller, remove a sleep counter from that creature.