Prevent all damage that would be dealt this turn by non-Human sources.
Sources that have no creature type at all are non-Human sources, as are sources with creature types that donâ€™t include Human. A creature that is Human and has other types, such as a Human Werewolf, is still a Human source.
If a spell or ability causes damage to be dealt, it will indicate what object deals the damage. The object dealing damage might not be the spell itself.