Muier's Instantaneous Immolation
(Alteration)

Range:  0
Components:  V, S, M
Duration:  1 round per level
Casting Time:  5
Area of Effect:  Creature touched
Saving Throw:  None

By use of this spell, the casting wizard can transform himself or another creature into a ball of flame. While in this form, the affected creature temporarily loses all his possessions and spellcasting abilities, but is able to fly at a speed of 48 (A) and cause damage to opponents simply by crashing into them. While immolated, a character strikes with the normal THAC0 of a monster half his level or Hit Dice. A hit causes 6d6 HP of fire damage.
An immolated creature can be harmed only by cold-based attacks and magical weapons while in fireball form. Cold causes double damage to the creature, while magical weapons cause normal damage. However, an immolated creature in motion is extremely hard to hit, having a base Armour Class of -2, which may be bettered (but not worsened) by the creature's natural Armour Class without armour or other protection.
The material component of this spell is some sulphur.

