Improvisational Poem of Slaughter(屠殺の即興詩Tosatsu no Sokkyōshi) is an incantation method in which the Flame Haze Margery Daw and her contracted Crimson Lord Marchosias use impromptu rhymed poems to unleash their spells. In the anime, the spell's name is censored to Improvisational Poem of Enclosed Killing(堵殺の即興詩Tosatsu no Sokkyōshi) in order to not violate the television broadcasting code.