Demonic Vessel

You and one target opponent exile a creature.
Put an X/Y red Demon Artifact creature token onto the battlefield with all abilities of the exiled creatures, where X is the total power and
Y the total toughness of the exiled creatures. If the creature you exiled was a demon, you can choose which creature your opponent exiles.
When the token leaves the battlefield, return the exiled creatures onto the battlefield under their owner's control.