Spirit of Hallowe'en

Defender, indestructible
As long as you control less than six Demons,
Devils, Horrors, Skeletons, Spirits, Vampires,
Warlocks, Werewolves, and/or Zombies, Spirit
of Hallowe'en isn't a creature.
Demon, Devil, Horror, Skeleton, Spirit,
Vampire, Warlock, Werewolf, and Zombie
creatures you control get +0/+2 and have
menace and vigilance.