Demoncall

(Book of Vile Darkness, DnD 3.0)

Divination[Evil]

Level: ; Blackguard 2; Demonologist 2; , Demonic 2
Components: V, S, M
Casting Time: 1 action
Range: Personal
Target: Caster
Duration: Instantaneous

The caster taps into the forbidden knowledge of demons, giving her a +10 profane bonus on any one check (made immediately) involving Knowledge (arcana), Knowledge (the planes), or Knowledge (religion).