Iblis

Iblis is an immortal monster of mass destruction that represents the raw power of Solaris. It acts as the main villain in Silver the Hedgehog's story in Sonic the Hedgehog. It is released from Princess Elise during the main timeline, and starts to ravage the world for hundreds of years into the time period of Silver the Hedgehog. In Silver's story, Silver the Hedgehog and Blaze the Cat continuously battle Iblis, but it always ends up proving too powerful for either of them to defeat for good as it can continually resurrect itself. In order to defeat Iblis in that timeline, Blaze is forced to seal it within her, seemingly killing both of them. In the main timeline, Mephiles kills Sonic and causes Elise to cry, breaking Iblis' seal. Once this happens, Mephiles then merges with Iblis to reform Solaris. After Solaris is defeated, Iblis is erased from time.