Superheroes Calling Spirits from the Vasty Deep

[ouroboros]

How many superheroes can you name that call ghosts, demons, genies, etc., for help in their adventures?

[Sharkerbob]

Glastig Uaine/Valkyrie from Worm could summon any three ghostly replicas of any other superhuman whose essence she had absorbed after they died.

[foxley]

Captain Triumph would summon the ghost of his dead brother, who would merge with him and grant him superpowers.

[Sharkerbob]

Cant believe I forgot:

Kaiden from Irredeemable, would summon ghosts by telling their stories. Kinda funny, she'd have to do it while engage actual combat sometimes, but she'd be able to keep at it without slipping up. At some point, she also summons the ghost of her dead lover, who actually sticks around without her needing to keep the story going.

Fire Ghosts: The Haunting of Fabian Gray - A few characters, including the main one, use Dreamstones to summon the essence of literary archetypes ("story ghosts"], and become imbued with their powers. Fabian himself has access to five such spirits, though this can cause problems at times.

[jeanvaljean]

Brother Voodoo, now Doctor Voodoo.