'Katana forged of glintstone. Masterpiece of a Sellian swordsmith. Light enwreathes the blade when sheathed, explaining its Moonveil moniker.' Moonveil is the canon's quiet bridge between the Land of Reeds and Sellia, Town of Sorcery. The blade-shape is a katana, uchigatana proportions, single-edge, drawn-from-sheath mechanic, but the steel is glintstone, forged by an unnamed Sellian master who saw a samurai weapon for the first time and decided to remake it as moonlight. The skill is Transient Moonlight : a Carian-style sheath-draw that fires a glintstone-edge wave. Sellia's swordsmiths were heretical even within Caelid's sorcerer caste, and the canon does not say which one made Moonveil specifically.

The Tarnished encounters Moonveil as a drop from the Magma Wyrm boss in the Gael Tunnel, a creature whose hunting ground would never have hosted a katana naturally. The wyrm clearly took it from a fallen Sellian swordsmith who had wandered too far. Two cultures meet in this single weapon : the Land of Reeds gave the blade-form, Sellia gave the moonlight, and the Magma Wyrm gave the resting place. The katana is, by the time the Tarnished claims it, a four-times-orphaned object, original smith dead, original samurai bearer dead, Sellia drowned in scarlet rot, the wyrm itself slain. The light it sheds is what survives.