Hellions by Zeb Wells. Volume 1

Bad is the new good! When the new nation of Krakoa opened its doors to all mutants and forgave all past crimes, its leaders knew that they'd have to accept some of their worst foes into the fold...but they didn't plan for what to do with them. Not to worry - Mister Sinister has plans for the troublemakers. Meet his new Hellions: Scalphunter, Wild Child, Empath, Nanny, Orphan-Maker, Psylocke...and Havok?! Under Sinister's direction, they are sure to become productive members of mutant society...and the new mutant team that you're going to hate to love! Though right now the Hellions can barely keep from killing one another, let alone find a way to fit into Krakoan society. Of course, that might be just what Mister Sinister is counting on when he sends them to clean up his messes..