The Crimson Dragon

+2: Reveal the top 4 cards of your library, cast any dragon creature spells without paying their mana value and shuffle all others into your library.
-5: Exile a dragon you control and a nonland permanent your opponent controls, cast a dragon creature spell from your graveyard.
-15: Create an emblem with "All dragons you control have Indestructible Lifelink and Trample"