As a mortal Rowan could not wield his Destroyer with the degree of competency that he might crave, but that changed when he channeled the power into a vessel, he should be able to direct at least a single percent of its power.
This was all the power he could afford to unleash. With the nature of a Destroyer, if he unleashed more, it would simply shatter his entire spell, and such an uncontrolled wave of destruction may hurt him alongside his enemies, it simply meant that anything over seven percent release of this power would kill him.
His Destroyer was born from Angelic roots, which meant it had a close relationship with Light. This was what manifested when Rowan linked the fragments of Envy and Pride to his Destroyer, a bright white light of a manner that had never been seen inside this universe.
