Drogon, Steed of the Queen

Flying, haste, trample, protection from red, black and green.
Whenever Drogon attacks, choose target creature an opponent controls. Drogon and that creature fight.
{b}{b}{r}{r}{g}{g} Sacrifice up to five nontoken creatures you control: Drogon, Steed of the Queen gets +7/+7 and deathtouch until the end of turn.