A monk who follows the Way of the Endless Expanse knows that the spirit can transcend the physical, performing feats that echo instantly across vast stretches of time and space. The Endless Expanse separates with vast oceans of void, but through the Way, its tranquility can embrace and empower.

Martial Entanglement

3rd-level Way of the Endless Expanse feature

Your body can transcend space and briefly occupy two places simultaneously. Once per round, when you successfully hit a creature with an unarmed strike, you can choose another creature within 20 feet of the target. Resolve the attack, using the same attack and damage rolls, against that creature in addition to the main target. Any effects other than damage, such as a stunning strike, apply to only one of those enemies.

You can use this technique a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest. While you have no uses available, you can spend 1 ki point to use this technique again.

 

Tranquil Abyss

3rd-level Way of the Endless Expanse feature

When you use your Patient Defense or Stillness of Mind features, you empty your mind and take on the tranquility of the Endless Expanse. Until the end of your next turn, you have advantage on Intelligence, Wisdom, and Charisma saving throws, and you can't be sensed by divination effects.

 

Hand of the Horizon

Optional 5th-level Way of the Endless Expanse feature

You can choose to gain this feature instead of Stunning Strike when you reach 5th level. You can change this choice only at your DM's discretion.

The reach of your unarmed strikes is increased by 5 feet. When you use Flurry of Blows, those attacks deal additional cold or psychic damage (your choice) equal to your Wisdom modifier on a hit.

Once per turn, if you successfully strike a creature with an attack during Flurry of Blows, you can spend 1 ki point to distort the area surrounding it. The target must make a Wisdom saving throw. On a failure, distance around the creature anomalously expands, reducing its movement speed to 5 feet and leaving it unable to make reactions or ranged attacks until the end of your next turn.

Keep Stunning Strike

You choose to keep Stunning Strike, rather than replace it with Hand of the Horizon.

Replace Stunning Strike

You choose to gain Hand of the Horizon instead of Stunning Strike.

Cross the Expanse

6th-level Way of the Endless Expanse feature

You can spend 1 ki point as a bonus action to teleport up to 20 feet to an unoccupied square you can see. This movement doesn’t provoke opportunity attacks.

When you use your Martial Entanglement feature, you can Cross the Expanse as part of that attack, rather than as a bonus action, if you teleport from a square adjacent to one of the targeted creatures to a square adjacent to the other targeted creature. If you do, you may spend movement equal to the distance teleported, instead of ki. If it isn’t your turn, you must spend ki.

 

Voidwalker

11th-level Way of the Endless Expanse feature

Your ability to step through the Endless Expanse improves. Your familiarity with the void grants you resistance to cold and psychic damage, and the range of Martial Entanglement and Cross the Expanse increases to 30 feet.

 

Fold the Infinite

17th-level Way of the Endless Expanse feature

You can exert your will to fold space onto itself. You can Cross the Expanse as a bonus action on each of your turns without spending ki. Whenever you Cross the Expanse, you can choose to occupy both your original square and your destination square until you move or are moved again. If you do, apply the following effects:

• You can be attacked or targeted by spells or maneuvers in either square, but attackers must succeed on a DC 8 flat check to target or attack you successfully. On a failure, the spell or attack, and any action used to attempt it, is wasted.
• You are affected by area effects in either square, but you have advantage on any saving throws against those effects unless both squares are within the area. You can’t be affected twice by the same effect on the same turn.
• You can use Martial Entanglement freely without spending uses or ki if you’re attacking creatures within reach of the two squares you’re occupying. You can even use Martial Entanglement to attack the primary target again if it’s within reach of both of your squares.
• When you move, choose either square and use it as the origin of your movement. External movement effects, such as a shove, move you from the position their controller targeted you at. If it isn’t specified (e.g. a gust of wind that spans both of your squares), you choose.
• When you attack or perform another activity, choose either square as the point of origin. You can make attacks of opportunity from either square.

Furthermore, you can spend 10 ki points to cast the teleport or gate spell without material components. Once you cast one of these spells, you can’t cast another spell using this feature for 1 week. After you reach 20th level, you can cast a spell using this feature again once you finish a long rest.