Potion Explosion
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Are White marbles used at all when the Ghastly Cauldron potions are not in play?
One poster's reading of the setup; no official source is among its sources.
- JonBob · Community · 2021-02-16
No. White marbles go into the Dispenser only when one of the two potions linked to the Ghastly Cauldron is in use, or when a Professor that uses the Cauldron is in play. Otherwise they stay in the box.