Randall Flagg

Randall Flagg is a demonic being from Stephen King's mythos - he is a character that has appeared in multiple works but was first introduced in The Stand, where he represented the concept of evil and stood in opposition to Mother Abagail, who represented good: the two fought for control over the survivors of a world plagued by disease.

Flagg's main purpose seems to be the bring about the end of civilisations by spreading destruction and sowing conflict and he has many supernatural powers by which to achieve his goals: such as necromancy, prophecy and the ability to lock into the predatory nature of man and beast.