Bite of the Wererat

(Spell Compendium, page 28, DnD 3.5)

Transmutation

Level: ; Druid 2; Sorcerer/Walker In the Waste 3; Wizard 3
Components: V, S, M
Casting Time: 1 Standard Action
Range: Touch
Target: Personal
Duration: 1 round/level
Saving Throw: No
Spell Resistance: No

With a sneeze, you grow a whiskered snout
and ratlike tail as fine gray fur covers your
thickening skin.

You gain a +6 enhancement bonus to Dexterity, a +2 enhancement bonus to Constitution, and a +3 enhancement bonus to natural armor. Your face lengthens into a ratlike snout, and you gain a bite attack that deals 1d4 points of damage (or 1d3 points if you are Small) + 1-1/2 times your Str modifier. You also gain the benefit of the Weapon Finesse feat. If your base attack bonus is +6 or higher, you do not gain any additional attacks.

Material Component: A rat's tail.