Dragon Aerie

{t} Add a {r}
{1}{t} Add 2 mana of any combination of colors,
use this mana only to cast dragon spells
When 1 or more artifacts you control enter the graveyard, create a 4/4 dragon token with flying
that is all colors. Then, if you control 9 or more
dragons, dragons you control get
+5/+5 and have menace.