Saurian great cleaver

[Disco]

This item has the ability to cast Keen edge for 5 charges a use. But it has no charges.'

Found on the snake quest.

[Crod Mondoon]

I have one equipped, and have found several, on different pc's over the last few months, on that quest, the charges are never there, I always assumed the Boss used them, until I noticed he was swinging a spear.