Sarkhan, Tamer of Dragons

Flash, haste
When Sarkhan, Tamer of Dragons enters the battlefield, gain control of target dragon that entered the battlefield this turn
{u}{r}{g}, {t}:You may put a dragon creature card with power less than or equal to double the amount of dragon creatures you control from your hand onto the battlefield. If you control three or more dragons, transform Sarkhan, Tamer of Dragons