Holy Mount

(Spell Compendium, page 115, DnD 3.5)

Transmutation

Level: ; Paladin 2
Components: V, S
Casting Time: 1 standard action
Range: Touch
Target: Your special mount
Duration: 1 round/level
Saving Throw: None
Spell Resistance: Yes (harmless)

Touching your special mount, you feel the divine power seep into your trusted friend and watch as a golden nimbus surrounds it.

Your special mount gains the celestial template (MM 31) for the duration of the spell.