Legends — Common
Enchantment — Aura
When Venarian Gold enters the battlefield, tap enchanted creature and put a number of sleep counters on it equal to the value of X as you cast Venarian Gold.
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.