This knife appears to be an ordinary knife to others. It has a dull grey look and has no magical properties.
If the Knife Bearer wields this knife, the knife physical properties will change. It would become a shiny knife, half of it gold colour and the other half silver.
The silver end of the knife has the ability to slice through anything with ease. Nothing can resist the power of this knife.
The gold end of the knife has the ability to slice between dimensions. If you focus your mind at the tip of the knife, you will feel a tug that will allow to draw the cut in the air. Connecting the ends of the cut will produce a window in the gap. This gap allows anything to pass through with no problems.
The window between dimensions will remain there. The Knife Bearer can close them by pinching the edge of the window. Doing so will make the window vanish.
Choosing which dimension to open depends on the cut. When cutting, each dimension has a different resistance. For example, the cut can feel like elastic or brittle. The same dimension can be open many times by finding its specific resistance.
Only the Knife Bearer has the ability to wield this knife. The mark of the Knife Bearer is a missing half of the thumb and index finger of their least dominant hand. The fingers can be healed together by any means.
The first one to wield this knife will become the Knife Bearer. The penalty is the lost of the thumb and finger. The power of the knife can be transfer to a different person, but it again requires the penalty.