Fiendform

(Unapproachable East, DnD 3.0)

Transmutation[Evil]

Level: ; Nar Demonbinder 6; Sorcerer/Wizard 6
Components: V, M
Duration: 1 minute/level

As polymorph self (see the spell entry in Chapter 11: Spells of the Player's Handbook), except as noted above and as follows.
You may take the form of any fiendish creature, demon, or devil that can be summoned by summon monster I-V.
You cannot assume multiple forms with each use of the spell, but you gain all the creature's extraordinary, spell-like, and supernatural abilities.
Your type changes to "outsider", and spells and effects that harm or ward evil outsiders affect you.
Spells that would banish you to your home plane end this spell and leave you staggered for 1 round per caster level but do not send you to another plane.
Material Component: A bone from any fiendish creature, half-fiendish creature, demon, or devil.