History of Enchanted Swords
It is quite impossible to enchant metal. So naturally metalsmiths through the ages have found exactly 3 ways around the fact.
The ancients found that, while metal will not bond with magic, a tiny amount remains after a spell has passed through. So their mighty men would use the same bronze sword given them at their coming of age in all their battles. After a few short centuries of their long lifespan, enough magic would have collected in the bronze blade for it to manifest a personality of its own.
Not all peoples could afford to be as patient as the ancients. The Pathruz were the first to perfect the art of condensing magic into crystal. They would then embed these crystals into rings and necklaces, daggers and armor, but mostly into swords of iron. These enchanted blades were not only as beautiful as their ceremonial kindred but also sharp and strong for battle.
Even so men still sought to make true enchanted swords, the perfect union of magic and metal. In Greyworld men practiced crafting metal entirely from magic alone. In stutters and starts they progressed, though they never reached their goal. The magic-made metal would fall apart as soon as they withdrew their hand. But the knowledge gained was not entirely without worth.
Those with skill learned to form swords from their magic, with which they could pierce and slash and cast spells in combat. Battle spells which used to be the domain of advanced troops were now cast by the common soldier. The old era faded and a new age was born.
And what of true enchanted metal? It remains ever elusive in the domain of the impossible. For now.