One of the first things Damian checked was what would happen if the origin of a spell—whether animal or monster—died while the mimicry skill remained active on another target. Naturally, he tested this on weaker, unranked monsters since higher-ranked ones were rare in the forest, and the spell didn't always work on them without him beating them up.
The unique aspect of bestowal-type magic was that it required the target's compliance; the target could either accept or reject the spell. Most monsters, cowed by his aura, accepted it without much resistance, but stronger creatures fought back. It was not a fighting type spell, well unless he used the support features for tracking the enemy or he could find something really interesting feature of a monster that he could copy which would help strengthen his body, but direct application on the enemy with this spell was not possible.