[Prerequisites: Monk lvl 3 / Warlock lvl 2]

When a monk attempts to experiment with the dark arts they often loose their monastic abilities, some even loose their sanity. Those that survive usually need an otherworldly patron and always become.. something else. The Way of the Eldritch hand is a powerful force for chaos, capable of doing both good and evil in equal measure.

Eldritch Strike

When you choose this subclass at 3rd level you discover mixing your Ki with the eldritch energy bestowed on you by your patron creates Dark Ki. This Dark Ki allows you to take full advantage of a foe's weaknesses. Once per turn you can deal an extra d4 Force damage to one creature you hit when you have advantage on the attack roll. 

You don't need advantage on the attack roll if the target has a condition you inflicted, that enemy is under the effect of the spell Hex, or if that enemy is incapacitated, as long as you don't have disadvantage on the attack roll.

The amount of the extra damage increases as you gain levels in this class, as shown in the Martial arts column of the monk table.

Rendering Ki

Prerequisite: Monk lvl 3 / Warlock lvl 2, Eldritch Blast Cantrip

When you pick this Tradition at 3rd level you use your Dark Ki to give your eldritch blast form. You immediately gain access to the Agonizing Blast Invocation, you also gain the ability to allow the form you choose to either push a target away or pull it to you, allowing you to choose between the invocations Grasp of Hadar and Repelling Blast. If you had any invocations granted by this feature you can switch them with another invocation from the list in your class description. Neither invocation granted by this feature count towards your number of invocations known.

Choose an Invocation:

Grasp of Hadar

Prerequisite: Eldritch Blast cantrip

Once on each of your turns when you hit a creature with your Eldritch Blast, you can move that creature in a straight line 10 feet closer to yourself.

Repelling Blast

Prerequisite Eldritch Blast cantrip

When you hit a creature with Eldritch Blast, you can push the creature up to 10 feet away from you in a straight line.

Jinx

At 6th level you Learn to further manipulate the ki of others to your advantage. Once per long rest as a bonus action or reaction to an attack roll made against you, you can spend a ki point to jinx a target you can see within 90ft. A creature affected by this ability has a small curse mark appear somewhere on their body, you decide what the mark looks like and where it goes. Once per turn you get advantage on an attack roll made against a creature affected by this ability. Additionally the creature has disadvantage on all attack rolls it makes against you. Once per turn you also deal extra damage to a creature affected by your jinx, when you activate this ability you can choose necrotic, radiant, fire or psychic damage and add 1d6 of that damage type to the damage roll of any attack that hits a creature affected by your jinx. This ability lasts 8 hours and its duration increases as you gain levels in this class as shown in the table below. Should a creature die while affected by your jinx the mark you chose will float off their body and you can choose another creature within range (90ft) and apply the jinx to that target without an action. When you use this ability at higher levels you can deal increasing amounts of damage as shown in the table below

Jinx Table: 

Level    |     disadvantage:  

6th    |              1d6, 8 hours

11th     |             2d6, 24 hours

      17th     |     3d8, Gain the ability to change your marked target once per turn as a bonus action or reaction.

 

While this ability does not count as the spell hex it cannot be used on a target affected by that spell. Remove curse cast on a target affected by this jinx ends the ability early.

Eldritch Step

Prerequisite: Jinx Ability 

At 11th level, once per turn as a bonus action you can teleport to an unoccupied space adjacent to a creature you can see within 45ft of you that is affected by your Jinx. Alternatively if a creature affected by your jinx is adjacent to you you can use your bonus action to teleport to an unoccupied space up to 45ft away from your current position. When you teleport this way you have advantage on your next attack before the end of your turn. You can use this feature a number of times equal to your Charisma modifier. 

Eldritch Torrent

At 17th level depending on your choice between Grasp of Hadar and Repelling blast you'll get access to either:

Unearthly Lunge

Spend 3 Ki points when preparing a ranged spell attack to launch yourself with the attack, adding the damage of an unarmed melee attack rolled with advantage should it hit. Meaning you roll your unarmed melee attack damage, as well as your Eldritch Strike damage and add the combined result to the spells damage roll, as long as your ranged spell attack doesn't miss. Eldritch strike damage done by this ability does not count towards your number of uses of the "Eldritch Strike" feature per turn. Your next unarmed melee attack has advantage if done before the end of your next turn as long as this attack is successful.

However if you miss the ranged spell attack you go flying up to 30 feet behind your target only stopping should you hit a wall, obstacle that provides at least half cover or a creature of medium or larger size. You take half of the fall damage equivalent to the distance traveled during the attack, rounded down (minimum 10 ft,), if you collide with a creature both you and the creature hit take the fall damage. A creature that would be hit by you can use their reaction to attempt to catch you by making a STR saving throw against your Ki save DC, neither of you take damage should they succeed. However if the creature that caught you is not an ally you become grappled by that creature. Unless caught by a creature you also are unable to move or take reactions, and have disadvantage on all saving throws until the start of your next turn.

For this feature to be activated when using Eldritch Blast you must spend 1 extra ki point to focus the tendrils of eldritch blast into one attack dealing 4d10 (1d10 per tendril at 17th level) Force damage to its target. When this feature is activated this way the effect of the invocation Grasp of Hadar is ignored. 

Unearthly Surge

Select a spell of either 1st or 2nd level that can also benefit from an increase in level from your warlock spell list. You can then spend 7 Ki points to cast that spell as a 7th level spell without needing a spell slot. 

You also gain the ability to expend a ki point when at least 3 enemies are within 15ft of you to cast Eldritch Blast as a bonus action, however when used this way each tendril of eldritch blast must target a different enemy within the spells range.