Skralt, Phyrexian Scourge

+3: Put a 4/4 Demon creature token with flying onto the battlefield. That creature has: At the beginning of your upkeep, you lose 3 life.
-7: You get an emblem with, at the beginning of your upkeep, you draw a card and lose 1 life.
-12: Sacrifice any number of creatures. For each creature sacrificed this way, search your library for an artifact or creature and put it into play.