It's called a "flame thrower".

Chocolate Internet Goddess: why that's a mighty dirty trick. I sent you'll all to get the savage gnats and you come back with a lame rooster. Oh, lordy...i.....lordy...it's just one of those silly things. How will i ever save the capitol city.  Do you need more tarter sauce! you can get some down at the ddupe store near 51st streeter

Igor: Master! I, um, found one of those electric gnat swatters and rewired it for much higher voltage. It is currently connected to the arc welder. I hope this pleases. *chesher cat grin*

Master Arcturus: Good Igor! Now go eat some of those Gnats, in fact go eat all of those Gnats. Get Nasty to help you if you need help catching them. 

Igor: But they are gnasty gnats,  and do not even taste good with cat paste, Er ketsup. I would much prefer to set them on fire. Yes I like the fire much more master, may I please set them on fire?

Master Arcturus: as long we get them gone! we do not want the goddess angry at us.

Nastydramus: Come on, Igor. I have just the thing. The humans invented it. It's called a "flame thrower". One human said it was for when you have someone way over there you want to set on fire, but just aren't close enough to get the job done.