WARNING: The following contains spoilers for Marauders #13 by Vita Ayala, Matteo Lolli, Edgar Delgado, and VC's Cory Petit, on sale now.
The Skybreaker is one of the mystical and ancient blades introduced in X of Swords, with the potential fate of the world riding on how well Storm can wield it in the coming battles against the Swordbreakers of Arakko.
However, it could have a deep connection to another Marvel franchise as well. The Black Panther who appears as a member of the Stone Age Avengers may very well be the same Wakandan King known as Olumo, who forged the Skybreaker in Marauders #13.
The overarching story of the Avengers of One Million BC introduced the earliest protectors of the planet Earth, including the earliest incarnations of some core Marvel legacies. This includes the very first Black Panther, a brilliant and skilled warrior-king who was the first man to discover the potential of Vibranium. He worked alongside the powerful mystics and cosmic figures that made up these ancient Stone Age Avengers, using the weapons he crafted from Vibranium to help fell a Celestial that had come to Earth. Little else is known about that hero, besides how he based his tribe at the Sacred Mountain of the Panther Tribe (later the site of Wakanda, where his descendants still rule) and that he was the first human to wield Mjolnir -- earning the respect of Odin, lasting into the modern-day.
But it turns out another aspect of his life may have just come back to the forefront of the Marvel Universe. In "X of Swords", Storm and the rest of the X-Men have been deciphering Polaris' prophecy and hunting down select and special swords to help them combat the Swordbreakers of Arakko. Storm is one of the chosen champions, and she ends up deciding that the prophecy alludes to the ancient Wakandan blade her ex-husband Black Panther had told her about. The story goes that the first Wakandan King -- his name long lost to time but remembered as the Olumo, aka the Knower -- upon discovering Vibranium, built a forge at a volcano to temper the elusive metal into a sword.
Working with his oldest children for many weeks, the Vibranium was eventually fixed into the Skybreaker, a sword capable of channeling energy such as lightning. With it, the Olumo protected his village and became King. He passed the blade down to his children, where it became a precious relic of Wakandan history and helped teach the earliest scientists of the nation how to shape and mold Vibranium into tools and weapons to elevate themselves about the rest of the world.
The description of the Olumo sounds incredibly familiar to the Black Panther of the Stone Age Avengers, although he never wore the Black Panther mantle or costume in his brief appearance as a legend in Storm's recollection. However, he is also described as the first King of Wakanda, and the first man to master Vibranium -- something Odin specifically has mentioned as being an impressive aspect of the hero. Being able to make a weapon that could control the elements themselves as the Skybreaker would certainly be impressive to a god such as Odin.
Could the Black Panther of the Stone Age Avengers be Olumo, the forger of the Skybreaker? It's certainly possible, and highly likely that even if the two aren't the same man then they are directly related, due to their stations as the first Lords of Wakanda. It would tie the history of the Avengers and the X-Men closer together, even as its theft threatens to rip apart relations between Wakanda and Krakoa.