Hag's cauldron

Very Rare wondrous item

If you pour a magical potion into this cauldron and spend 1 hour stirring it, the potion is enhanced in one of the following ways (once per potion):

Extend: The duration of the potion's effects is doubled
Empower: The effects of the potion are doubled.
Mix: Mix two potions together, creating a single potion that causes both potions' effects when consumed

Magical cauldron made from twisted steel and painted with green, glowing symbols. IT's front forms an eerily grinning face.