Caligula's Spear

Origin
In 1934 author Robert Graves wrote "I, Claudius," a fictive biography of the life of the Roman Empower Claudius. In it, Caligula goes absolutely insane and famously declares war against Poseidon, ordering his troops to go stab the ocean. This was a highly exaggerated anecdote from ancient Roman historian Suetonius' claim that Caligula went to the English Channel with troops simply to collect seashells, which in all likelihood was a translation error.

Effects
Caligula’s act actually occurred however and he had the tip constructed from a very reactive substance, some sort of alkali metal. But the impact that this made was so impressive that it made the spear an artifact that not only dispelled water but completely obliterated it. Dispels any water it comes into contact with a curdling fizzle.