an mart is essentially a custom small lorepiece that people create using other lore(s) to give their character, faction, or group a bit of advantages/disadvantages
Magical Artifact (MArt): is an item, lore piece or CA that bends the rules of the specific lore piece you (the player) are making this item from. Some items are simply made to enhance the rp or narrative and some are to enhance your advantages in crp or disadvantages.