Magic Fang(Player's Handbook v.3.5, p. 250)
Level: Druid 1, Ranger 1, Death Master 1, Urban Druid 1, Urban Ranger 1, Consecrated Harrier 1, Vadalis Beastkeeper 1, Dragon (SpC) 1, Scalykind (SpC) 1, Bestial (BoVD) 1, Scalykind (PG) 1, Scalykind (DD) 1, Dragon (Dr) 1,
Components: V, S, DF,
Casting Time: 1 standard action
Target: Living creature touched
Duration: 1 min./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 nonlethal damage to lethal damage).
Magic fang can be made permanent with a permanency spell.