Megaton MCX

Assist (Another player can pay up to {6} of this
spell's cost.)
Trample, Menace,Vigilance, Reach, Obstruct 3
(can block up to 3 additional creatures each combat.)
Joint Crew 6 (This vehicle's crew must include
creatures from another player besides it's controller.
May be used during any other player combat step to
block or attack. )