DA knife 
 Power creeped to hell by the Angel blades

 

Name: Demon killing knife of the Kurds, Ruby's knife
Origin: Supernatural
Type: Knife / Dagger
Powers and Abilities: Enchanted to slay demons and hellhounds (if it hits them in a vital spot like the abdomen/head), doesn't work on the knights of hell (but still causes them pain though)
Destructive Capacity: Street level (it's hax, doesn't focus on raw power)
Wielder(s): Ruby, Sam, Dean
Material or Element: Enchanted metal, the hilt seems to be made of either bone or wood
Needed Prerequisite for Use: None notable
Notable Attacks/Techniques or Alternate Forms:

Other: