Ari-sen

Indestructible, reach, defender
{g}{w}, {t}: Put a +1/+1 counter on Ari-sen.
With six +1/+1 counters, Ari-sen looses defender.
With twelve +1/+1 counters, he gains trample.
With eighteen +1/+1 counters, he gains flying.
"He had outgrown himself."
-The gardener