Hien Sha, Storm Maker

Hien Sha can't be countered unless each opponent discard a card.

Flying, ward—discard a card.

Dragons you control have "whenever this creature attacks or blocks, target player discards a card."
At the beggining of your combat step, put X +1/+1 counters on each Dragon you control, where X is the number of players with less cards in hand than you.