Trait: Artifact
Items with this trait are artifacts. These magic items are iterms that start off as normal items and grow with their wielder's power. Features and talents with this trait offer evolving power that grows with the wielder in a similar fashion. Often, they have story significance, and will usually start off either mundane or rare, to being as strong and as many a legendary item. For actual rarity, they will always be Unique.
They also have unique features that can be swapped out for other ones. Artifacts can also be merged with/crafted from similar weapons (such as creating a Ginormous Sword out of a Bastard Sword of Dragons' Bane