The Last Kids on Earth and the Midnight Blade

Having survived the first winter after the monster apocalypse, Jack Sullivan suddenly discovers that his favorite weapon has gained strange and unexpected power. The trouble is that after the upgrade, the Shredder no longer listens to its master. Meanwhile, an old enemy, whom the last kids on Earth thought was defeated, has only doubled in strength. Now Jack must master his new abilities – otherwise the world is (again) doomed!