Kosaku Kawajiri, Fake Father

When Kosaku Kawajiri enters the battlefield, put
a Dust counter on another target creature you
control.
Whenever a creature with a Dust counter is
blocked by a creature, exile the defending
creature.
Whenever a creature with a Dust counter on it
dies, return all creatures exiled with it to the battlefield under their owner's control. Those creatures then each deal damage to their owner
equal to their mana value.