WAY OF THE SOUL KNIFE
You follow a monastic tradition that teaches you to focus your ki to form a blade of psychic energy. Each soulknife's personal blade, referred to as a mind blade, differs in color and shape according to his personality, mental strength and even mood.
Starting when you choose this tradition at 3rd level you learn to form a semi-solid blade composed of psychic energy. As an action, you can form the mind blade. The mind blade is identical in all ways (except visually) to a shortsword. The mind blade is considered magical for purposes of overcoming damage resistance. The mind blade is also treated as a monk weapon. The mind blade does slashing and psychic damage. By spending 1 Ki point, you may throw the mind blade as a ranged weapon up to 30 feet. Whether or not the thrown mind blade hits the target, it dissapates after the attack is made.
At 6th level, you can empower the mind blade with a build-up of psychic energy. For each Ki point spent, the mind blade does an additional 1d6 damage (maximum 4d6). This extra damage is only for one attack. However, after the mind blade is charged with the extra damage from spending ki, you can hold the charge until it is used in an attack.
At 11th level, you can momentarily fragment your mind blade into numerous identical blades, each of which strikes a nearby opponent. You make one attack against each opponent within reach. When using bladewind, you forfeit any bonus or extra attacks granted by other abilities.
KNIFE TO THE SOUL
At 17th level, when making an attack with the mind blade, you can spend 6 ki points and if the attack hits the target, it is subject to a Feeblemind spell. The save DC is 8+proficiency bonus+ Wisdom modifier.