Ascended Demon Physiology

Can someone recommend me some powers that would be perfect for an ascended demon superhero.

Something that useful for both healing and combat and can be used for a weapon (ex. a staff/sceptre.)

So if the devil himself is an angel (fallen angel) but has an offspring with a human would that child be part angel or demon? Since the devil is considered unholy could that dictate the outcome of the child? Or could it actually grant nephalem physiology?

If the forces of both heaven and hell joined together and decide to whip out all monster and creatures that not human and earth based creatures could they do it