Assaultron Dominator

Double strike
Fabrication (This creature is not affected by radiation. At the beginning of your upkeep, you may put a +1/+1 counter on this creature. If you don't, then put a 1/1 colorless Construct creature token onto the battlefield.)
Pay {r}{r}{r}: Deal 4 damage to target creature at the end of your turn, if Assaultron Dominator is in play.