Dragon's Bane

Warpath wants big boom!

Dragon's Bane is a supposedly magical concoction used by the sixth-century human wizard, Beorht. Its ingredients include sulfur, rock salt, potassium nitrate via seagull droppings, and charcoal.

Fiction

The Transformers cartoon

As Beorht approached the Dragon Mound with a group of time-travelling Transformers, he warned them that the mound was inhabited by a wandering dragon. Luckily he had a full bag of Dragon's Bane handy for just such an eventuality. When the dragon put in an appearance and started breathing fire at them, Beorht tossed the bag to Warpath, who threw it directly at the dragon. The bag was ignited by the dragon's breath, exploding in the creature's face and driving it away. A Decepticon Raider in King Arthur's Court

Notes

• For those who failed Introduction to Chemistry, this is essentially the formula for gunpowder. Or, as Ramjet says, "Guuunnnpoowwderrrrr!"