Experiment Destroyer

Flying, trample.
{3}{u}{g}: Adapt 4. (If this creature has no +1/+1
counters on it, put four +1/+1 counters on it)
Whenever experiment destroyer adapts,
put a adaptation counter on it.
At the beginning of your end step, if experiment
destroyer has no adaptation counters on it,
put a +1/+1 counter on experiment destroyer.