Blast Beam Cannon

{x}, {t}: Blast Beam Cannon deals X damage to
any target.
At the beginning of the end step of a turn Blast
Beam Cannon dealt damage, put two
malfunction counters on it. At the beginning of
the end step of a turn Blast Beam Cannon didn't
deal damage, remove a malfunction counter from
it. At the beginning of your upkeep, if Blast
Beam Cannon has four or more malfunction
counters on it, sacrifice Blast Beam Cannon.