Base Class: Monk
The Witchblades are the martial arm of the Elsewhere, nomads from outside of time and space who have adapted harness the flow of energy in the void. They are monastic in tradition, with a focus on disrupting the magics of their opponents. The Elsewhere not a race, but a gathering of all who have fallen into the void by happenstance or design, and chosen to join and adhere to their traditions. They anchor themselves within a plane by sacrificing a limb and replacing it with the dark energies that exist outside the rational bounds of existence. This takes years of training and study. The elite take this training a step farther. They are able to channel these energies through a special long dagger called a Witchblade, the weapon from which they derive the name of their order.
Witchblade's Extension
The Monk is able to channel the energies of their anchoring limb into a special long knife. This knife's hilt and blade are each approximately one foot in length, although the style and shape may vary, and the blade flips out of the hilt and locks into place with a simple flick of the wrist. This becomes the Witchblade's only Monk Weapon and scales in damage with the monks unarmed die.
Severing Strike
Starting when you choose this tradition at 3rd level, you can channel anti-magic energies through your Witchblade as you harness your ki. Your Flurry of Blows attacks are made with your Witchblade, rather than unarmed. Whenever you hit a creature with one of the attacks granted by your Flurry of Blows the target immediately loses concentration on any spell they are maintaining.
Flanking Flash
At 6th level, you gain the ability to slip in and out of reality, confusing your enemies and dancing across the battlefield. Spend 2 ki points to cut a rip in spacetime, momentarily connecting it to an open space on the opposite side of your opponent, gaining advantage on attacks and a +2 to AC until the start of your next turn. Each strike that hits allows you the option of teleporting 10ft to an unoccupied space.
Hone of the Void
At 11th level, you gain the ability to augment your Witchblade further with your ki. As a bonus action, you can expend up to 3 ki points to grant it a bonus to attack and damage rolls when you attack with it. The bonus equals the number of ki points you spent. This bonus lasts for 1 minute or until you use this feature again.
Boundless Domain
At 17th level, you can harness your anchors full potential. Your Witchblade may be used to cut a gate in spacetime allowing you to travel enormous distances, and take others with you as well. For 5 ki points, cast the Teleport spell. Additionally, this casting circumvents the restriction to the current plane of existence so long as the caster has been to the other plane before.