古に封印されし究極黒魔法（物理） (Inishie ni Fuuin Sareshi Kyuukyoku Kuro Mahou (Butsuri))

Background
This song was uploaded onto Niconico and YouTube on March 3, 2015. It was featured in a compilation album, "EXIT TUNES PRESENTS Vocalofantasy feat.初音ミク".