Antithesis
Celeste's powers centred around healing, sure, but they were also pretty lethal.
To any Defiled, that is.
And the reason was pretty simple.
Life energy was the antithesis of the corruption brought about by the Great Collision, so it made sense that the abominations did not like it. Celeste would even go as far as to say that every attack she made was akin to a Defiled being injected with poison.
Of course, the rank of the abomination and her own rank were two major factors that affected the strength of that sensation. Still, she was content to have some way to harm the Defiled as a healer.
After all, it would not do if she was forced to stay behind the front lines and be protected like some helpless little girl.
Celeste would hate that.
Immensely.
As it was, though… she was in a great position to thin down the ranks of the vast army.