Godrick, the Grafted

Whenever Godrick, the Grafted, enters or attacks,
you may sacrifice another creature. If you do, exile it
with a Godrick counter on it.

Godrick, the Grafted, has all static and activated
abilities of creatures with Godrick counters on them.

If Godrick, the Grafted, would die, exile it instead
and return it to the battlefield transformed under its
owner's control.