Nature's Favor

(Spell Compendium, page 146, DnD 3.5)

Evocation

Level: ; Druid 2; Ranger 2
Components: V, S
Casting Time: 1 swift action
Range: Touch
Target: Animal touched
Duration: 1 minute
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)

Rubbing the animal's side, you whisper the final bit of the spell's ritual. The animal glances at you before turning its attention to your foes, bristling as it does so.

You grant the subject animal a +1 luck bonus on attack rolls and damage rolls for every three caster levels you possess (maximum +5).