Hamato Yoshi

Hamato Yoshi enters the battlefield with four +1/+1 counters on it.
Whenever another green creature enters the battlefield under your control,
put a +1/+1 counter on Hamato.
Then if that creatures power is greater than Hamatos power,
put another +1/+1 counter on Hamato.
"Death comes for us all, Oroku Saki, but something much worse comes for you."