Explosive Potion Expansion. In addition to the new potion tiles that you can use alongside those from the base game, this expansion also introduces new mechanisms to the game. With curse and reward tiles, you receive additional bonuses or penalties. The spectral cauldron and wild ingredient tiles allow you to change the composition of the ingredients in the dispenser, triggering larger chain reactions. Finally, the professor tiles bring small changes to the core game rules, adding more variety to the gameplay. Contents: 12 marbles, wild ingredients, 32 new potion tiles, 1 spectral cauldron tile, 7 professor tiles, 15 curse tiles, 15 reward tiles.