The way Blood Crow Strike is written does not make sense.
The casting time is 1 Round, and the duration is Instantaneous. Now this can be taken two ways:
The change is instantaneous, and permanent, allowing a Sacred Fist to have a permanent ranged attack. This seems totally overpowered, and I can't believe this is what was intended; or
The spell takes the whole round to cast, the effect is instantaneous, but leave no time for the Sacred Fist to attack. Next round the spell is spent, and the character gained no advantage from it. This seems even worse than Option 1.
What was really intended with this spell, and how can a Sacred Fist benefit from it?