Way of the Toxic Soul

A monastic tradition shrouded in secrecy and feared by many, because the toxins they work with and the locations they call home are so inherently dangerous to nonpractitioners that few would risk trying to learn more. Monks who follow this tradition run a wide gamut of intentions, but all share an infatuation with the study of toxins and often temper their bodies through imbibing them to truly understand their effects. This tempering warps their very ki into a venomous thing, often transforming them into walking death.

Venomous Strikes

Starting at 3rd level, you learn ways to harness and launch your toxic ki. Once on each of your turns when you hit with an unarmed strike, you can deal additional poison damage equal to your Martial Arts die. A creature that takes this damage must succeed on a Constitution saving throw or be poisoned for a number of rounds equal to your Constitution modifier.

Venom Bolt

Starting when you choose this tradition at 3rd level, you can hurl searing bolts of toxic blight.

You gain a new attack option that you can use with the Attack action. This special attack is a ranged spell attack with a range of 30 feet. You are proficient with it, and you add your Consitution modifier to its attack and damage rolls. On a hit, it deals poison damage equal to your Martial Arts die.

When you take the Attack action on your turn and use this special attack as part of it, you can spend 1 ki point to make the special attack twice as a bonus action.

When you gain the Extra Attack feature, this special attack can be used for any of the attacks you make as part of the Attack action.

Tainted Aura

Starting at 6th level, through rigorous training, you have learned to project and mold your ki into a poisonous aura that brings ruin to those around you.

• As a bonus action on your turn, you can spend 1 ki point to manifest your aura. It extends 15 feet from you in every direction, but not through total cover. Each other creature takes poison damage equal to your Constitution modifier when it enters you aura for the first time on a turn or starts its turn there. The aura requires Concentration.

While your aura is manifested, you can spend 1 ki point to empower it for 1 round. While it is empowered, when a creature within your aura takes poison damage, it must succeed on a Constitution saving throw or be poisoned for a number of rounds equal to your Constitution modifier

Empowered Potency

Starting at 11th level, you have learned how to finely control the potency of your venomous ki, increasing its power or completely nullifying it. Poison damage you deal ignores immunity and resistance to poison damage and the poisoned condition. Additionally, you can nullify your aura's effects for certain creatures. On your turn, you can choose a number of creatures up to your Constitution modifier. The chosen creatures take no damage from your aura and can breathe normally within it.

Infusion of Hemlock

At 17th level, your mastery over your ki has turned it into a vile, lethal thing that is deadly to nearly all living beings. When you deal poison damage to a poisoned creature, it must succeed on a Constitution saving throw or suffer one level of exhaustion.