Following the path of the Serpent's Coil has made you extremely relaxed physically. You can twist, contort and subdue targets with ease.

Contortionist's Technique

At level 3, when you choose this subclass. You gain the following benefits:

• When you make a Strength (Athletics) check to grapple a target, you may treat this as a Dexterity ability adding your DEX modifier instead of your strength, additionally you may use your bonus action after successfully grappling a creature to make an unarmed attack.
• You are able to grapple targets up to 2 sizes bigger than you however if the creature is 2 sizes larger, this will require a ki point (no action) to analyse a subduable point and they will have advantage on the saving throw to resist the grapple effect. 
• When squeezing through a gap that is 1 size smaller, your movement is not effected. You can squeeze through gaps 2 sizes smaller treating 1ft of movement as 2ft.
• When moving a grappled creature, creatures of your size or smaller do not reduce your movement speed.

The DC for escaping a grappled by you will also use your DEX instead of STR.

Note: When you are the target for being grappled, you will still be required to use your STR and not your DEX

Grapple Attacks

You have unique attacks to apply to an opponent provided they are grappled by you. This can only be done to an original target at later levels. 

• Slingshot - As a bonus action, spend 1 additional ki point (2 total) to throw an opponent with your flurry of blows, up to half your movement speed, a target 2 sizes larger than you will cost 2 ki points (3 total). A target larger than you can make a CON saving throw (DC 10 + DEX) and halve the damage taken on a success, creatures 2 sizes larger have advantage. The damage type of this will be bludgeon damage.
• Chokehold - Spend 2 ki point and a bonus action you can restrict air flow perfectly, this keeps them alive but will knock the creature prone and unable to speak. When you activate this skill, the creature makes a CON saving throw (DC = 8 + DEX + WIS). On a fail, they are knocked prone and cannot speak.
• Vice Grip - Whilst a creature is grappled, you may use 1 ki point and your action to tighten the grip and dealing damage equal to 1 unarmed attack however the damage type becomes force damage.

Soul Bind

You can manifest your soul into a way to grapple, some manifest their body into tentacles or snakes and other will manifest it into additional arms.

You may spend ki to create an AOE attack grappling all opponents that fail a check to be grappled (one DC for all extra victims and a separate DC for your original target), Your original and first target of this can still be hit with an unarmed attack. The AOE will begin at 10ft and can be increased by 5ft for every extra KI spent. 

• When you spend 1 ki point to squeeze your target, all other grappled creatures must make a CON saving throw, on a fail they take the same amount of damage as radiant damage instead of force damage.
• When your original target dies, or as an action, you may teleport to another creature grappled by you changing them into your original target.

Note: using this and spending 1 ki point will allow you to target 2 people, your first grapple target is free and is referred to as the "original" target whereas the target that cost the ki point is not.

Stone Coils Technique

When you grapple a target, they begin to petrify. They must make CON saving throws (DC 8 + DEX + WIS) or gain 1 stage of petrification. The amount of stages needed to fully petrify a target will be as follows:

•  ((8 + amount of sizes larger than you [Minimum of 0]) - your WISDOM Modifier). The target will remain Petrified for 1 minute.
• Example: You are a small creature with a +4 to Wisdom, grappling a medium creature ((8 + 1) - 4) > (9 - 4), 5 stages are needed

Additionally, you may cast enlarge/reduce on yourself twice per day, once for enlarge and once for reduce. This requires no martials, verbal or somatic components. In either of these forms, you deal additional force damage equal to your WISDOM modifier with each monk weapon or unarmed attack you make. When you use your step of the wind feature to dash or disengage in these forms you will also become resistant to magical and non magical slashing, bludgeon and piercing damage until the start of your next turn.

 

 

Whole Rotation

You have mastered the way of the Serpent Coil and there is no target big enough for to escape your grapple. You have also learnt a way to channel your soul further into to destroying that of a creature. 

• Size restrictions on grapples are removed for you
• At the start of your turn and/or when a creature fails a saving throw to escape your grapple they will take damage equal to your martial arts dice + your DEX + Your WISDOM. This damage is radiant or if it is your original target force damage.
• Changing opponent no longer takes an action and you may teleport to any grappled target (provided they are grappled by you)