Aura Blade

Looks like a nondescript metal rod (exact details up to player), but when magick words "Crack'ss-Vwoom" a blade of the user's choice extends from either end (or both) of the rod with hand guards of choice; glows with inner radiance, and is covered in colored flame (color dependent on the wielder's Aura.  Doubles as magic focus.  Does 1 D8 slashing damage; 1D6 fire damage.  Fiends and Undead receive 2 D8 slashing damage; 2 D6 Fire damage.  Critical hit lead to limb removal of DM's discretion.  Defense Bonus, reduces damage done to you by your Dex modifier.  For example, if you have a Dex of 14, and a Modifier of 2, you would reduce damage taken by 16.

Notes: Half Hour