Field Artillery

Defender
Bombard-{1},{t}: Put a 2 -1/-1 counters on up divided up between up to 2 creatures target opponent controls, or deal 2 damage to
target planeswalker or player. (Activate only
if Field Artillery is an artifact creature.)
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn)