Ninja vs Aliens (Destructo)

The Aliens are attacking, and the only one that can save us is... a Ninja? *record scratch* Hold up, did I read that right? Ninja? What the... Lets get on with it. Youre a Ninja, and you have to destroy all the alien ships with a sword. *record scratch* This is ridiculous, really? A SWORD? THE SHIPS ARE FLYING! What? oh, theyre shooting fireballs? And you hit them with the sword? I mean, its not as far fetched as breaking buildings down with an over fed chicken... Ninja vs. Aliens is the best pa...