Sarkhan the Dragonless

0: Sacrifice a dragon you control and Add X mana to your mana pool where X is the sacrificed creatures converted mana cost.
0: Put a loyalty counter on sarkhan for each dragon in your graveyard 
-10: Search your library for any number of dragons and put them into your graveyard and put 2 of them into play. Transform Sarkhan the Dragonless