You conjure a claw-footed cauldron filled with bubbling liquid. The cauldron appears in an unoccupied space on the ground within 5 feet of you and lasts for the duration. The cauldron can’t be moved and disappears when the spell ends, along with the bubbling liquid inside it.
Once a potion is poured into the cauldron, the caster may change the properties of that potion to another of the same rarity or lower. Common for Common, Uncommon for Uncommon or Common and so on. These changes last till the potion is drunk. Artificer's Alchemist potions are considered Uncommon for the purpose of this spell.
At higher levels: If this spell is cast using a 4th level spell slot, the rarity of the potion can be increased by one. So a Common potion can be transformed into an Uncommon potion, or an Uncommon potion into a Rare potion and so on. The increase in rarity of the potions is increased by +1 for every 2 levels above level 2. Cast at 6th level, as an example, a Common potion can be transformed to a Rare potion.
* - (a potion of Common or higher rarity)