The Great Machine

"This could've been made with our weapons, this entire time? Possible for a mortal to make it to such a place? You are kidding, are you not, Galahad ? You were never the wondrous type, so why tell us such lies now?"

- Lord Ector de Brias , to Galahad, former Lord.

A hidden charm put onto every weapon belonging to the Twelve Lords of the Isles, capable of melding into one single magical artifact, powered by the lightning of a Dragonkin of good. The Great Machine is the result of the melding of these weapons. A large, metallic construct resembling a siege weapon, much like a cannon with the shape of a ballista. It's creator, a Dragonkin warrior by the name of Lanzeaxe, who originated in Pharos Fenestra, the Floating Island, had learned of the decades-long plan slowly being enacted by Malus, the Charred Colossus, and would use most of her strength to deduce a counter to this plan. She devised a plot of bestowing magical artifacts onto a group of warriors that'd be too keen on keeping them for themselves. These weapons all hold a single aspect of their designs in common, the ability to propel a projectile, enemy, or the weapon-holder themselves. Bring a certain Dragonborn egg with her, in order to have it not be devoured by any of the gluttonous dragons of the Ancient City. 

Lanzeaxe, or Lans, would use the forges made by The Adadis Courthall in order to create all twelve of the weapons she'd bestow in secret onto each lord. In order to keep this a secret, she dug secrets into the minds of many of the Lancein nobles and warriors of magical weapons. She was able to deliver weapons of varying shapes and sizes across all of the places she determined to be safe enough from Malus' forces. The only weapon she did not hide away was done in order to find somebody she could deem as safe enough to tell this secret to, when the time to graft the Great Machine came, being Sir Galahad, Lone Knight. Having known him as a nomadic warrior, thanks to Sistrola Thasnavi's scry into the future, and with the potential to be a paragon of good, she slowly shifted his life in order to get to the moment he found his magical weapon. Nobody but the two dragons know of this. 

Assembly

After the defeat of each of the Twelve Lords of the Isles, three warriors of the Coalition, jokingly calling themselves the Snap, Crackle, Pop, had taken all of their weapons to a raised hill, where they kept the imprisoned Lord Ector de Brias, along with Galahad. Once they moved him out of the way, Galahad explained to his former ally what they were doing, and then just after, the process towards making the machine was started. Lanzeaxe would spend the time moulding the energy of the weapons, along with their physical components, soon making the body of the Great Machine. One last component was needed, but was forgotten by both parties. The Primal Energy of Sharanthis . At this point, it still has not been reclaimed in order to send members of the Coalition to the Ancient City.