Way of the Planar Jouster

Monks of the Way of the Planar Jouster have an uncanny attunement with planes outside the prime material. Through strict training, they can project forces out of their bare hands, disappear briefly into the ethereal plane, and use a near-forbidden technique to dislocate an enemy’s soul into the Astral Plane.

Supernatural Flurry

Whenever you attack a target using your Flurry of Blows, you can disrupt the planar space around them. At the end of your turn, you can move the target up to 5 feet away for each attack granted by flurry you directed at them. If this movement would force the target to impact a stationary object, such as terrain, it takes 1 martial arts dice bludgeoning damage per 5 feet of forced movement remaining. Ki-empowered strikes effect this damage. Additionally, unarmed strikes on your turn have a reach of 10 feet. You have disadvantage on attacks against targets beyond 5 feet when using this feature.

Plane Disruption

Starting at 3rd level you gain the ability to slightly disrupt the planes around a creature with your bare hands. On your turn, the first creature you hit with an unarmed strike takes one additional Martial art die of damage of either psychic or force damage. the extra damage dealt by this feature increases to 2 martial dice at 11th level.

Juxtapose

At 6th level, you can thrust yourself into the Ethereal Plane at a moment's notice. When another creature hits you with a melee attack, you can use your reaction to vanish into the ethereal plane as if by the etherealness spell and make that attack miss. On the start of your next turn you appear within 10 feet of the space you vanished from. You must finish a short or long rest before you can use this feature again.

Additionally, any time a creature fails their saving throw against your Stunning Strike monk feature, you can choose for that creature to be instead under the effects of the banishment spell until the end of your next turn.

Ethereal Step

Beginning at 11th level, you can spend one ki point as a free action to project power from the many planes out of your feet. Until the end of your turn, you can climb through the air, if you move at least 5 feet horizontally for each 5 feet vertically. When you are 10 feet above a creature's total height you are considered out of their reach.

Additionally, your supernatural flurry's movement can be used to move your opponent's up to the sky or down towards the earth. If you're moving them upwards, they must succeed a dexterity saving throw or be tossed the distance. if moving them downwards, they must succeed a strength saving throw or become prone. 

Lastly, you learn to step through the Ethereal Plane. As a bonus action, you can cast the etherealness spell using 2 ki points, without expending a spell slot, but the spell ends at the end of the current turn. you can cast etherealness with this feature equal to half your proficiency bonus rounded down and regain all charges at the end of a long rest.

Astral Rip

At 17th level, you gain the ability to forcibly push someone's spirit into the astral plane, disrupting their soul's connection with their body. When you hit a creature with an unarmed strike, you can spend 3 ki points to partially dislodge their spirit, which lasts for many days equal to your monk level. This effect is harmless until you take an action to make the special melee attack. The creature must make a wisdom saving throw. If it fails, their spirit is ripped from their body and propelled into the astral plane resulting in the creature dropping to 0 hit points. On a success, the creature is blinded and incapacitated until the end of its turn.

You can have only one creature under the effect of this feature at a time. You can choose to end the effect harmlessly without using an action.