Young Drogon, the Strong

Flying
{r}: This creature gets +1/+0 until end of turn.
At the beginning of your end step, if you control creatures named Young Viserion, the Proud and
Young Rhaegal, the Wise, you may have Young Drogon, the Strong deal 3 damage to target
creature.
Drogon, named after her husband Drogo, is the largest
of Daenary's brood.