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Cauldron of the Damned

wondrous item, legendary (requires attunement by a spellcaster)

This large iron cauldron is 6 feet wide, 4 feet tall, and weighs 500 pounds. It is covered with dark runes and symbols of evil.

Attuning to the Cauldron

To attune to the cauldron, you must submerge yourself in its brew during a short rest. The brew is a foul mixture of blood, bile, and other vile substances, and it may have harmful or unpredictable effects on you. Once you have attuned to the cauldron, it will sprout legs and follow you wherever you go. The cauldron is still treated as an item that is worn or carried by you.

Brew a potion

To create a potion, you must spend one hour brewing it using a cauldron. Once brewed, you can drink the potion yourself or give it to someone else as an action. The potion lasts for 24 hours, then loses its magic if not consumed. As an action, you can drink the potion or give it to another creature to drink. The creature that drinks the potion gains it's effects for 1 hour, unless the potion states something else.

Force-Feeding

As an action, you can attempt to force a creature within your reach to drink a potion that you have brewed using the cauldron. The creature must be incapacitated, restrained, or grappled. You and the creature make a contested check using either Strength or Dexterity, but as a spellcaster attuned to the cauldron, you can use your spellcasting ability instead.

Brew of Mutation

This is a strange concoction that alters your physical form. To brew it you must throw in the cauldron a vial of blood from a shapeshifter. The creature that drinks the potion must roll on the Mutation table below and gain that mutation effect for hours.

d12	Mutation Effect
1	You grow a pair of wings and gain a flying speed equal to your walking speed.
2	You sprout horns and gain a gore attack that deals + your Strength modifier piercing damage on a hit.
3	You grow scales and gain resistance to acid, cold, fire, lightning, or poison damag (your choice).
4	You grow fur and gain advantage on saving throws against cold effects.
5	You grow claws and gain a claw attack that deals + your Strength modifier slashing damage on a hit.
6	You grow feathers and gain the effects of Feather Fall (transmutation) Level: 1 Casting Time: 1 reaction Concentration: No Ritual: No Up to 5 creatures fall at 60 feet per round and take no falling damage before the spell ends. View on dndbeyond.com
7	You grow gills and gain a swimming speed equal to your walking speed. You can also breathe under water.
8	You grow fangs and gain a bite attack that deals + your Strength modifier piercing damage on a hit.
9	You grow eyes all over your body and gain advantage on Perception checks that rely on sight.
10	You grow tentacles and gain a tentacle attack that deals + your Strength modifier bludgeoning damage on a hit and can grapple the target (escape DC equal to your spell save DC).
11	You shrink in size by one category (to a minimum of Tiny).
12	You grow in size by one category (to a maximum of Huge).

Brew of Corruption

This is a vile concoction that grants you dark power at a cost. To brew it you must throw in the cauldron a creature’s heart and a black pearl. The creature that drinks the potion gains the following benefits and drawbacks:

The creature’s spell save DC and spell attack bonus increase by 2.
The creature gains resistance to necrotic damage and immunity to poison damage and the poisoned condition.
The creature’s alignment becomes evil.
The creature’s maximum hit points are reduced by an amount equal to it's level or challenge rating. This reduction lasts until the creature finishes a long rest.

Brew of Necrosis

This is a deadly brew that causes rapid decay. To brew it you must throw in the cauldron a withered flower and a piece of flesh or bone from an undead. The creature that drinks the potion must make a DC 20 Constitution saving throw or take necrotic damage and age by years. On a successful save, the creature takes half as much damage and ages by one year.

Brew of Madness

This is a dangerous brew that induces a random form of insanity. To brew it you must throw in the cauldron a creature’s brain and a vial of poison. The creature that drinks the potion must roll on the Indefinite Madness table in the Dungeon Master’s Guide (p. 260) and gain that madness effect for days.

Curse of the Cauldron

If you are attuned to the cauldron, you are cursed by its dark magic. You can’t be unattuned from the cauldron unless you are targeted by a remove curse spell or similar magic. While cursed, you have the following drawbacks:

You have disadvantage on saving throws against spells and other magical effects.
You are vulnerable to radiant damage and silvered weapons.
You develop a flaw that reflects your arrogance and superiority over others. You can choose one from the list below or roll a d6 to determine it randomly.

d6	Flaw
1	I am the chosen one of the cauldron, and no one else is worthy of its power.
2	I look down on those who don’t use the cauldron’s potions, and mock them for their weakness.
3	I believe that the cauldron’s corruption is a blessing, and I seek to spread it to others.
4	I am obsessed with finding more ingredients for the cauldron, and will stop at nothing to obtain them.
5	I think that the cauldron’s curse is a test of my endurance, and I refuse to seek any cure or relief.
6	I trust only the cauldron, and I suspect that everyone else is plotting to take it from me.