Phosphorus Cauldron

The Phosphorus Cauldron is a neutral vessel who's strong enough to contain all forms of magic.

History
The cauldron was left by the demons behind them when the Charmed Ones chased them from the Magic School in 2006.

In Unnatural Resources, Paige used it to collect a bit of magic from all the creatures of the Magical Community in order to make the strongest potion ever and destroy the Source of All Evil: Cupids, Mermaids, Fairies, Nymphs, Leprechauns, Unicorns, Billie,...