Living crucible

Fighters who become Living Crucibles have discovered an external means of power. While most other fighters train in martial traditions or study the art of war, Living Crucibles hone their craft of alchemy and prepare their body to endure compounds poisonous to others. In exchange for this rigorous physical and mental preparation, these fighters are able to temporarily push
their bodies past their natural limits. Under the influence of their alchemical compounds these fighters can see in darkness, enhance their speed, inure themselves to magical attacks, and more.

Compound Creator

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 “Compounds” below. 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.

Student of Alchemy

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

Quick Creation

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.

Living Cauldron

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).

Toxin Transmutation

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.

Living Catalyst

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

Compounds

Compounds are presented in alphabetical order.
Adrenal Injection. For the next minute, your movement speed is increased by 10 feet and your jumping distances are tripled.
Allsense Injection. For the next minute, you have blindsight out to a distance of 30 feet.
Arcane Eye Oil. For the next hour, you can sense magic as if you were under the effects of the detect magic spell.
Draught of Bull’s Strength. For the next 10 minutes, you have advantage on Strength ability checks and saving throws.
Draught of Cat’s Grace. For the next 10 minutes, you have advantage on Dexterity ability checks and saving throws.
Draught of Bear’s Endurance. For the next 10 minutes, you have advantage on Constitution ability checks and saving throws.
Draught of Fox’s Cunning. For the next 10 minutes, you have advantage on Intelligence ability checks and saving throws.
Draught of Owl’s Wisdom. For the next 10 minutes, you have advantage on Wisdom ability checks and saving throws.
Draught of Eagle’s Splendor. For the next 10 minutes, you have advantage on Charisma ability checks and saving throws.
Elfsight Oil. For the next 8 hours, you have darkvision out to a range of 120 feet.
Fleshknit Phosphate. For the next minute, if you have at least 1 hit point, you heal a number of hit points equal to your proficiency bonus at the start of each of your turns.
Ironmind Injection. For the next hour, you have advantage on saving throws made against being charmed or frightened.
Liquid Courage. You gain temporary hit points equal to your Constitution ability score plus twice your level in this class. You lose any remaining temporary hit points from this compound after 1 minute.
Liquid Rage. For the next minute, your weapon attacks deal an extra 1d4 damage.
Presto Powder. For the next 10 minutes, you have advantage on ability checks made to determine initiative and you can use a bonus action on each of your turns to take the Dash or Disengage action.
Spellshine Ointment. For the next minute, you have resistance to damage from spells.
Steelskin Ointment. For the next minute, you have resistance to bludgeoning, piercing, and slashing damage.
Tenmen Tincture. For the next hour, you count as one size larger when determining your carrying capacity, and you ignore the heavy property of weapons.