The Summoning of Halloween spirits

Tales of the Sorcerer : Every year a special ritual is performed where the Wizard visits "The Hanging Graveyard of Nowhere" and reveals his true identity in order to keep his immortality. The Hanging Graveyard of Nowhere got spirits from both the living and dead world. The ritual performer yields the power of summoning the dead spirits and make the undead come to life by possessing them with the spirits of the dead. The Hanging Graveyard got its name by the hanging spells of underworld which runs through the darkest places to that which are hellbound. The tale will continue with the next editions, where you see what supernatural power it gains. Be ready to know who the spirits of dead possess?