[quote=@Kiso]
quick question can anyone give me a decent explanation for the arc while I try to find what page I was one before I had to leave

[/quote]

Basically, Renny sent a OP Demon guy against the S-classes to give them a kick in the pants and remind us they are nit invincible, Revan faced off against Demon Sairis and beat him, though it did leave him severely weakened. The boss was severely wounded by Jeanne via Suicidal self-nuking finisher magic, followed by hana and Anna dealing some more damage and Sairis dealing the finishing blow, after coming back as a Devil slayer for some reason I still can't figure out entirely since it was demon magic that supposedly seemed to turn him into one. Nigel had weakened Yunin immensely by having his nano-bots eat him from the inside out, and now he's dead.