Transmutation
Level: Dragon 1, Druid 1, Incarnate 1, Mystic Ranger 1, Ranger 1, Scalykind 1, Urban Druid 1
Components: V, S, DF
Casting Time: 1 standard action
Range: Touch
Target: Living creature touched
Duration: 1 minute/level
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)
Magic fang gives one natural weapon of the subject a +1 enhancement bonus on attack and damage rolls. The spell can affect a slam attack, fist, bite or other natural weapon. (The spell does not change an unarmed strike’s damage from non-lethal damage to lethal damage).
Magic fang can be made permanent with a permanency spell.
Source: Player’s Handbook (Page 250)