Experiment Sliz

Graft 1 (This creature enters the battlefield with a
+1/+1 counter on it. Whenever another creature enters
the battlefield, you may move a +1/+1 counter from
this creature onto it.)
At the beginning of your end step, for each
+1/+1 counter put on Experiment Sliz this
turn, choose a kind of counter at random that
Experiment Sliz doesn't have on it from among
deathtouch, hexproof, reach, and trample. Put a
counter of that kind on Experiment Sliz.