Shishkebab (Fallout 3)

Shishkebab is a "flaming sword" that can be made from a Motorcycle Gas Tank, a Motorcycle Handbrake, a Lawnmower Blade, and a Pilot Light (found in most ovens). It can be constructed with the use of the proper schematic.

The Shishkebab instantly sets enemies on fire upon contact, dealing 2 damage a second for 5 seconds in addition to doing Melee damage. The schematics can be obtained from Vance at the end of the Blood Ties questline, or purchased from the trader Lucky Harith. Owning both of these schematics will allow you to create an upgraded version (10% damage increase) of the Shishkebab called Shishkebab V2 which requires the same materials.

As with all fire and energy weapons, it can set off gas leaks. However, with the Shishkebab this can be caused by simply having it equipped and drawn.

Trivia
The Shishkebab looks a lot like a crude version of Nero's Red Queen sword from Devil May Cry 4, down to being a flaming sword with a motorcycle handbrake.

I found a third schematic for this next to a workbench in a red shack just a little bit east of SatCom Array NN-03d

Appearances
Shishebab appears only in Fallout 3.