Daenerys Dragon Queen

Can not be countered if you have five or more
dragon creatures in your graveyard.
{x}{r}{r}: Exile {x} dragon creatures from your
graveyard, deal {x} damage to all creatures your
enemies control.
At the start of your turn, if you have no dragon creatures in your
graveyard Daenerys, the Dragon Queen gets
flying and annihilate 3.