Enchantment (Compulsion) [Mind-Affecting]
Level: Druid 1, Ranger 1
Components: V, S
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Duration: Concentration +1 round/level
Saving Throw: None
Spell Resistance: Yes
You feel inexplicably angry as you near the conclusion of the spell’s casting. The feeling subsides slightly as you release the spell into your target.
Enrage animal affects only creatures of the animal type and bestows a +4 morale bonus to Strength and Constitution, a +2 morale bonus on Will saves, and a –2 penalty to Armor Class. This effect is otherwise identical to a barbarian’s rage, except that the animal is not fatigued at the end of the rage.
Source: Spell Compendium, page 82.