Milton, the Mad Tinkerer

+1: Create an artifact creature token with "This creatures power and toughness is determined by rolling 1d6" onto the battlefield.
-2: Exile the top card of your library face down, you may choose to put it into your hand or discard it and deal 4 damage to any target.
-8: You get an emblem with "Artifacts you control gain "Tap: Sacrifice this artifact: Deal damage equal to its mana cost to any target".