The bladed dagger is a single-edged weapon made of a grey-green metal. The blade is very sharp, and allows its wielder to cut rips in the fabric of reality. Doing so creates portals that remain open and require no key. The bladed dagger has always had a guardian: a single individual tasked with the protection and responsible use of its power. Such guardians are marked by the loss of the last two fingers on their left hand. Only the guardian can see and seal portals created by the bladed dagger.
There is only one guardian alive at any one time. The bladed dagger chooses its new guardian; neither force, coercion, nor magic can be used to become the guardian. The last guardian was Cordan. After defeating Other Mother, he gave the bladed dagger to the man who originally stole it.