Low Orbit Ion Cannon

Sacrifice a creature: Low Orbit Ion Cannon gets +3/+3 until end of turn. Activate this ability only if Low Orbit Ion Cannon is being targeted by an instant an opponent controls.
When Low Orbit Ion Cannon becomes targeted by an instant, put a laser counter on it. As long as Low Orbit Ion Cannon has a laser counter on it, it has deathtouch.
As long as Low Orbit Ion Cannon is blocking, it gets +3/+1.