Killdozer

At the beginning of your upkeep, pay {b}{b}. If
you don't, exile Killdozer.
Indestructible, Hexproof, Menace, Trample, Vigilance, Deathtouch
Crew 8 (Tap any number of creatures you control
with total power 8 or more: This Vehicle
becomes an artifact creature until end of turn.)