Sonic Mobius - Marve's Cruelty

After a few weeks of peace, a new event occurs. Sonic and the freedom fighters find a new ally, but what they don't know is that they also find a new enemy. An enemy far more dangerous than any other, that Sonic and his friends have ever met or faced off with. Will our heroes win another battle or will this monster emerge victorious? *WARNING: Rating may change to M*