Fear of Sleep Paralysis

Duskmourn: House of Horror Commander · #43 · Rare

Enchantment Creature — Nightmare

Flying Eerie — Whenever this creature or another enchantment you control enters and whenever you fully unlock a Room, tap up to one target creature and put a stun counter on it. Stun counters can't be removed from permanents your opponents control. (They won't untap if they have stun counters.)