"Bloody hell. Screw this." MC said, lazily dodging the ground fire coming at him while the ship just dispensed more aliens. Getting a mischievous idea in his head, MC opens a couple portal tunnels until he is deep within the ship, easily finding the reactor. Opening another portal, Mc splits up the core into bits using his portals. But instead of causing a big explosion like he thought was going to happen, the ship just lost power and started to fall to the ground, MC portaling out and above the ship. 

The ship did make a satisfying reverberation as it hit the ground though, so he was a bit happy with that, or so he accepted, and began to look for something else to do. No one was firing at him at this point, having been crushed under one of the ships he grounded.