As a writer of relatively firm SF, it should be established that even in the magical ignorance of deep history, the spell components for "fireball" can't be bat guano.
They're naphtha and white phosphorus.
I've got to read those again. I always liked Lumley's spin on the Mythos.
@cerebrate And the "reusable" portions of the spell are then a sling with an asbestos cup plus a flint and steel? 😉
@cerebrate
I remember in Brian Lumley's Cthulhu mythos novel The Burrowers Beneath, an ancient tome had the recipe to summon Azatoth, the nuclear chaos at the heart of the universe.
The recipe was basically a critical mass of U235