Imnoch, Draconic Praetor

+2: Up to one target Dragon creature gets +2/+2 and gains haste until end of turn.
-X: Search your library for a Dragon creature card with power X and put it onto the battlefield, then shuffle your library.
-7: You get an emblem with "At the beginning of your end step, create a 5/5 red Dragon creature token with flying."