One word: Gunblade

Knife-wrench!

a man is holding a wrench in his hand and says knife wrench

Alt: Scene from the tv show Scrubs in which the janitor waves a homemade contraption of a knife attached to a wrench and exclaims "knife-wrench!"

You know what I like about this guy? He's basically madlibs. "This is [weather phenomenon] and he has a [weapon] that is also [another weapon] " Also FF13 has two characters that follow that template