Exacting Shot

Until your next turn you imbue your weapon with your
killing instinct. Any strike against a favored enemy crits on
15-20 until your next turn.
The affected weapon also ignores any negitives due to
cover whenever you fire at a favored enemy (unless the target
has full cover, in which case the normal rules apply)
If the ranged weapon or the projectile fired has any magical
effect or property related to critical hits, this spell has no
effect on it.
If you do not have a favored enemy from the ranger class
this spell does nothing.