Kamia, the Jungle Dancer

Hexproof, first strike, trample
At the beginning of your end step, if you
attacked with one or more creatures this turn,
put that many +1/+1 counters on Kamia, the
Jungle Dancer.
{x}, Remove X +1/+1 counters from Kamia:
Create X 1/1 green and blue Mutant
creature tokens.