Machinium, Bane of Life

+2: Create a Mine artifact token with "Whenever one or more creatures your opponents control attacks, destroy this & an attacking creature at random"
-3: Create a 1/3 Machine artifact creature token with, "At the beginning of each end step create a Mine artifact token."
-7: You get an emblem with, "At the beginning of each upkeep create a Mine artifact token." and, "Sacrifice a Mine: Deal 3 damage to any target."