Hellfire Spell (Metamagic)
The power of hellfire runs through your veins.
Prerequisites: Any spellcasting class, fealty to Mephistopheles.
Benefit: You can alter a spell with the Fire descriptor to become a hellfire spell.
When you cast the spell, the Fire descriptor is replaced with the Evil descriptor, and any fire damage inflicted by the spell is instead untyped. If the spell summons a creature, its home plane is considered Baator and any fire damage dealt by that creature is instead untyped. In addition, all flames or fire created by the spell or associated with any summoned creatures appear dark and colorless and generate no light.
A hellfire spell uses a spell slot 1 level higher than the spell’s normal spell level.