Ambrotam, Bearer of the Curse

{1}{w}{b},{t}: Put an immortality counter on
Ambrotam, Bearer of the Curse. He gains lifelink.
Ambrotam, Bearer of the Curse get +1/+1 for
each immortality counter on it.
Whenever Ambrotam, Bearer of the Curse leaves
the battlefield you may remove an immortality
counter from it. If you do, return it to the battlefield under your control.