Yen Moa, Knowledge Bound

When Yen Moa, Knowledge Bound enters the battlefield, draw 7 cards.
At the beginning of your end step, put a -1/-1 counter on Yen Moa, Knowledge Bound for each card less than 7 in your hand.
When Yen Moa dies, discard your hand.
"The cost of power is keeping it. And there is no greater curse than that of godly responsibility."