Shastrah, King of the Shamans

Superpower(whenever this creature attacks put
a +1 +1 counter on X different creatures were
X is the power of this creature)
When Shastrah, King of the Shamans enters
the battlefield create a 2/2 shaman with Superpower
"Power is the basis of my empire, and if you don't have it you should not anger me"
Shastrah, King of the Shamans