Lexicon

A lexicon (レキシコン) are a series of magical artifacts containing various knowledge of any type of branch across, Arcane Science and al information. On the continent Eurasia, the lexicon are highly valuable relics containing information pertaining to the ancients, along with the magic of the lost and ancient spells. According to Aeternitas, just having one lexicon is a immense feat and allows the holder to obtain Lost Magic, and even gain the knowledge to learn such (such as the Arc of Embodiment or even a Slayer Magic).