The Out of Place Artifacts (古代文明の遺物 ŌPĀtsu, Relics of the Ancient Civilization) are items left by the ancient civilization. They are impossible to re-create with current technology and knowledge.
The Magick Association has been known to safeguard some of these OOPArts, with the Original Grymoire being their most valued until it was lost.
Crystalline Sealed Blade: Murakumo
Demolishing Blade Manifestation: Kusanagi
Sealed Treasure Spear: Izayoi