La Fleur du Mal was found by Jean Desmarais in the Parisian catacombs in October of 1793 when he was escaping prosecution. The sword offered him protection and a means to destroy his enemies in exchange for swearing a blood oath. Thus, Jean Desmarais and his descendants were cursed with the obligation to wield the sword under the identity of Guillotine.
La Fleur du Mal appears to be a sentient being with a never-ending thirst for blood, which is absorbed by the sword as it cuts through the enemies of its wielder. The sword speaks directly to its user's mind, so it normally can't be heard by other people. However, Gamora has been shown to be able to hear it.
When Guillotine tried to use the sword against Rick Jones, the weapon refused to cut him, having deemed Jones "unclean" due to Eddie Brock loaning him the bloodless Venom symbiote. Guillotine was instead forced to defeat Jones by summoning the spirits of La Fleur du Mal's previous wielders.
In 6000 BCE, the Sumerian goddess Ereshkigal created the earliest version of La Fleur du Mal from a demon's spinal cord. The mystical weapon, then known as the Bloodline, feasted on the souls of human beings.
In 1750 BCE, ancient warlords attempted to convert the Bloodline into a weapon of human war, but the demonic energy in it remained too dangerous to allow it to be wielded by mortals. Many heroes and kings tried to tame the demon within the blade in the following years, but they all succumbed to its power.
It wasn't until 974 CE that someone managed to bend the Bloodline to their will; Queen Haasen of Languria accomplished such a feat by encasing it in a magic-infused alloy. Naming it "Blutdämmerung," she used the new sword's power to subjugate her own people. After Queen Haasen was toppled by her subjects in 998 CE, Blutdämmerung was found in the rubble of her torched castle and partially rebuilt by amateur blacksmiths. It exchanged hands many times in the next centuries, always bringing misfortune to its owners.
In 1478 CE, an order of French monks skilled in the arts of mystical metal casting acquired the sword and worked on restoring it for the next twenty years, reinforcing the spells created by Queen Haasen and rechristening the blade "La Fleur du Mal." The sword changed shape and purpose with each new owner in the following centuries, its thirst for human blood increasing accordingly.
The sword's long association with the Guillotine bloodline started during one of the bloodiest periods in European history, but it was only by the end of World War II that the Guillotines learned to let the sword guide their hands as much as they guided it, thus creating a mysterious symbiosis between them.
- The sword's name was confirmed in the Marvel Contest of Champions video game, for which both it and Guillotine were specifically created.
- The sword's name translates to "The Flower of Evil" in English. In French, "fleur" can also be used to refer to something that causes attraction or seduction.
- Les Fleurs du mal is the name of French poet Charles Baudelaire's most famous work.
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