Mukotai Soulripper

“Whenever Mukotai Soulripper attacks, you may sacrifice another artifact or creature. If you do, put a +1/+1 counter on Mukotai Soulripper and it gains menace until end of turn. <br> Crew 2 <em>(Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)</em>”