Transmutation
Level: Druid 3, Sorcerer 3, Wizard 3
Components: V, S, DF
Casting Time: 1 standard action
Range: Personal
Target: You
Duration: 1 minute/level (D)
By calling on the ancient and timeless magical energies of the elements, you complete the spell. Immediately your form begins to change, taking on aspects of the element you envisioned while casting the spell.
When you cast this spell, choose an element (air, earth, fire or water). You assume the physical appearance and many of the qualities and abilities of a Medium elemental of the chosen element. Primal form also grants you the elemental subtype appropriate to the chosen element.
You gain a +4 bonus on saving throws against mind-affecting spells and abilities. There is a 25% chance that critical hits and sneak attacks scored on you are negated, as if you were wearing armour with the light fortification special ability (DMG 219). You cannot cast spells, and you lose any spell-like, supernatural and extraordinary abilities of your own form. You gain additional abilities depending on the element you chose when you cast the spell:
Your equipment melds into your new form and becomes non-functional.
Source: Spell Compendium (Page 161)