The Great Henge

This spell costs {x} less to cast, where X is the
greatest power among creatures you control.
{t}: Add {g}{g}. You gain 2 life.
Whenever a nontoken creature enters the battlefield under your control, put a +1/+1
counter on it and draw a card.
"He never talks, he just sits here and judges evedybody.
Kinda unsettling."