Way of the Serpent

As a serpent Monk, you have dedicated study to the way of the snake. 

Viper's Venom

When you choose this subclass at third level, you gain the following effects.

• Whenever you hit with an unarmed strike or a monk weapon, you may spend 1 ki point to force the target to make a Constitution saving throw. If they fail, they are poisoned for one minute.
• Once per turn when you attack a poisoned creature, you may deal 1d6 extra poison damage. This damage increases to 1d8 at eleventh level, and 1d10 at  seventeenth level.

Rattlesnake Glare

At 6th level, you gain the ability to paralyze others with only a look. As an action, provided both you and the target can see each other, you can spend 3 ki points to cast hold person. If the target is already afraid of you, it automatically fails it's saving throw. At tenth level, you may spend 6 ki points to cast hold monster instead

Boa's Grip

Beginning at 11th level, whenever you try to grapple a creature, you gain the following benefits:

• Youmay have it roll against your ki save DC instead of your athletics
• While a creature is grappled by you, it cannot breathe.
• While you are grappling, you do not lose concentration on spells.

Serpent Form

At 17th level, you gain the ability to  transform into a big ass snake