Pleure Sanguine

Pleure Sanguine is a powerfully destructive, yet evil spell said to have been discovered originally by Underis Querum. It is also said that he, after learning the source of the spell's tremendous power, cast the only written record of its incantation into the sea. Though supposedly lost to the sea before any other being's knowledge of its existence, stories about the book containing the Pleure Sanguine have nonetheless surfaced, meaning that its containing book was at some point recovered, perhaps by Merpeople

Legend
History and rumor account the discovery of the spell to Underis Querum, but this may not be true, since no account of the spell is ever given in The Jibber of Querum. The popular acceptance of this is due to the demonic nature of the spell itself. Legend recounts that Querum discovered the spell while conducting research in the former forest of Renderam, which was not far from a large village of the same name. Probably due to the the influence of a powerful demon, the incantation is said to have simply rolled off his tongue, and its power leveled the central portion of the forest, leaving a black, ashen plain in its stead. Querum supposedly penned the words that had engraved themselves into his mind and took them with him as he traveled to see a friend and fellow magical researcher in the village of Renderam. He entered the gates of the village to find that it was filled with corpses, visibly untouched; the spell he had just cast had consumed the souls of the entire village's inhabitants, leaving not a single survivor.