Black-Char Shaman

Manashift {4}{b}{b} (You may cast this spell for its Manashift cost. If you do, it becomes green and loses all other colors.)
If this creature is red it has Haste.
If this creature is green it has +2/+2 and
Undying (When this creature dies, if it had no
+1/+1 counters on it, return it to the battlefield under its owner’s control with a +1/+1 counter on it.).