Zulu, Shadow Raptor

Colorwalk, Vigilance, Hexproof
-When Zulu, Shadow Raptor enters the battlefield
put 1 shadow counter on her.
-Whenever Zulu, Shadow Raptor would take
damage or be destroyed remove one
shadow counter from Zulu, Shadow Raptor
-At the end-phase of any turn, you can pay {x} and put X shadow counters on
Zulu, Shadow Raptor