The Demon Sword Master of Excalibur Academy

is a Japanese light novel series written by Yū Shimizu and illustrated by Asagi Tōsaka. Media Factory have published thirteen volumes since May 2019 under their MF Bunko J imprint. The light novel is licensed in North America by Yen Press. A manga adaptation with art by Asuka Keigen has been serialized in Kadokawa Shoten's shōnen manga magazine Monthly Shōnen Ace since November 2019. It has been collected in seven tankōbon volumes. An anime television series adaptation directed by Hiroyuki Morita and produced by Passione premiered in October 2023. Plot A thousand years ago, the world was at war. Led by the Six Dark Lords, humanity as a whole was nearly led to the brink of extinction. However, humanity had hope in the form of the Six Heroes. With their power, the Six Dark Lords fell one by one until finally, only one remained. In the year 447 of the Holy Calendar, the Undead King, Leonis Death Magnus, also fell but before his capital, Necrozoa, was conquered, he sealed his own body with a powerful barrier and cast a resurrection spell on himself. He declared that he will concede victory only this once but he shall rise again in one thousand years to conquer humanity for that is the mission given to him by the Goddess of Rebellion. In the present time, a young girl named Riselia Ray Crystalia stumbled upon the ancient ruins of Leonis's mausoleum. Accidentally undoing the seal, Leonis awakens after his thousand-year slumber in the body of a ten-year-old human child. Mistaken to be a refugee of the Voids, Riselia takes Leonis into her care and Leonis begins his mission to uncover what has happened to the world while he slept.