Potion Explosion: Fulminating Serum is a new potion that allows you to catch lightning in a bottle, with this promo item consisting of eight bottles to mixed with the components of the Potion Explosion base game.
"Discard 2 Ingredients of your choice from the same slide track of the Dispenser back into the tank. No Explosions are triggered".
This promo was originally part of the "Potion Explosion Game Night" pack, that included the Fulminating Serum, acrylic skill tokens, and play mats. You can find the other two products for sale from that pack by clicking the links above.