Juxtapose

Target a creature that is blocked, it phases out.
Create a copy of that creature that is an illusion
in addition to its other types with ''if this
creature is the target of a spell or ability, destroy
it''. The copy becomes blocked instead.
After combat damage is dealt, targeted creature
phases in and deals combat damage to the
creature who blocked. If you can't, deal combat
damage to defending player instead.