User blog comment:ImperiexSeed/Michael or Death, who's stronger?/@comment-4632123-20120430090229/@comment-3481504-20120430154419

He does have flaws, however.

Inverse, all the angels, or God personally, in some translations, when he was not needed, locked him up.

By a "unseemly little spell", as he calls it, can bind him to another.

He cannot fully destroy souls or remove their remnants.