Noh Wei, Master of Pacifism

Defender
Whenever Noh Wei, Master of Pacifism blocks,
exchange its power and the power of target creature
it's blocking until end of combat.
{w}{r}, Sacrifice Noh Wei: The next time a source of
your choice would deal damage to you this turn,
prevent that damage. If damage is prevented this
way, Noh Wei deals that much damage to that
source's controller.