Balor lord

With their flaming wings and skull-like countenance, balor lords are among the greatest and most feared of their kind.

Special abilities
A balor lord has 30/+3 damage reduction, 100% immunity to electrical damage, and 20/- acid, cold, and fire damage resistance. It is immune to poison and has a spell resistance of 28.

The weapon used by this creature is vorpal with a DC of 14. This creature can use several spell-like abilities with a caster level of 15. The abilities usable five times per day are aura versus alignment, darkness, fear, greater dispelling, and wall of fire. The abilities usable once per day are fire storm and implosion. In addition, this creature can summon tanarri four times per day.

When killed, a balor lord explodes, dealing 50 fire damage to all creatures (and doors) in a area. Spell resistance applies, and victims are allowed a reflex saving throw (DC is usually 20) for half damage. (This is identified as a fireball spell in the OnSpellCastAt event.)