Lumino-calibur

is the Noble Phantasm of Mysterious Idol X Alter. It is a forbidden Guitar Blade called the 'Calibur of Evil Strings' that is only be playable by those who have a contract with the demon of music. MIX Alter bought the guitar for cheap on a sale of the treasures of the planet Chamizu. 
With Lumino Caliber, Mysterius Idol X Alter can use it to manipulate cultivated super emotional particles called Idolium, causing the area to change into a stage of wavering light. By charging her mana into the guitar, MIX Alter can preform a devistating slashing attack.
==References==
Category:Noble Phantasms
Category:Anti-Unit Noble Phantasms
Category:B rank Noble Phantasms
Category:Swords
Category:Noble Phantasms introduced in Fate/Grand Order
Category:Noble Phantasms of Artoria Pendragon
Category:Parody Noble Phantasms