Demon Sword Master of Excalibur Academy: Season 1 The Most Powerful Demon Lord Has Been Reborn... Unfortunately, That's The Only Part Of His Plan That's Gone Right 1000 years ago, Leonis Death Magnus, the King of the Undead, sealed himself in suspended animation with a plan to be reborn and re-marshal his demonic armies anew. Instead, he awakens to a world where magic has changed, a new race of monsters terrorizes the planet, and he's now a 10-year-old boy. Fortunately, his beautiful "rescuers" think he's a normal lad with amnesia and decide to send him to an elite magical school... which is the perfect place to give those plans for world conquest a serious rethink as he poses as THE DEMON SWORD MASTER OF EXCALIBUR ACADEMY!