Tulwar of Amir Khurum

Description
"Conan lifted his knife and smote, and the watchers were dumbfounded to see his blow checked apparently in midair, with the loud clang of steel that meets an unyielding substance. He wasted no more effort. He knew that not even the legendary tulwar of Amir Khurum could shatter that invisible curtain."

- The People of the Black Circle

Amir Khurum was a legendary prince and commander of the Wazuli tribe. The Wazuli revere his memory for his even-handed nature as a chief - he dealt honorably with all and led them to a great deal of treasure in his career.

If the legends are to be believer, this tulwar can pass through any armor, though it is hard to say if this is the original item or an elaborate forgery.

Source
The  can be found in Legendary Chests.

Repair
This item can be repaired with a.