Tenser's Master of Arms (Alteration)

Level: 4
Range: Touch
Duration:  1 turn/level
Components: V, S, M
Casting Time: 4 segments
Saving Throw: None
Area of Effect: Fighter touched (fighters only)

This spell, when bestowed
upon a fighter, improves the fighter’s skill with 1 melee
weapon. A weapon with which the fighter is not proficient
becomes a weapon of proficiency in the character’s hands.
A weapon of proficiency is treated as a weapon of specialization.
There is no double weapon specialization allowed
with the spell effect. The spell will only affect fighters and
fighter sub-class characters.

MC: A feather from a crane.