Living Crucible

When you choose this archetype at 3rd level, you learn to create alchemical compounds toxic to others but empowering to you.

Creating Compounds. You learn three compounds of your choice, which are detailed under the "Fighter (Living Crucible (Third Party)): Compounds" spell list. You can create any number of these compounds you know by using alchemist's supplies and spending 10 minutes to create them. These compounds remain potent until the end of your next long rest, after which time they become inert and have no effect. You learn two additional compounds of your choice at 7th, 10th, and 15th level. Each time you learn new compounds, you can also replace one compound you know with another one.

Consuming Compounds. As a bonus action you can consume a single compound using this feature. You can safely consume a number of compounds up to 1 + your Constitution modifier (minimum of 1). Each compound you consume after that causes you to gain a level of exhaustion. When you finish a long rest, you regain the ability to safely consume compounds. You can benefit from multiple compounds at the same time, but taking the same compound more than once provides no additional effects. The benefits associated with each compound apply only to you. Any other creature that consumes one of your compounds must succeed on a Constitution saving throw DC = 8 + your proficiency bonus + your Intelligence modifier) or become poisoned for 1 minute.

Also at 3rd level, you gain proficiency with alchemist's supplies. Your proficiency bonus is doubled for any ability check that uses this proficiency.

At 7th level, once per long rest you can use a bonus action to quickly create and consume one compound that you already know how to make. This does not count against your daily limit of consuming compounds.

At 10th level, the number of compounds you can safely consume increases to 3 + your Constitution modifier (minimum 1). At 18th level, the number of compounds you can safely consume increases to 5 + your Constitution modifier (minimum 1).

At 15th level, you can use a bonus action to end one effect causing you to be poisoned. When you do, you gain temporary hit points equal to your level in this class.

At 18th level, the number of compounds you can safely consume increases to 5 + your Constitution modifier (minimum 1).

At 18th level, when you finish a long rest you can choose to replace one compound you know with another one.