You give me a headache

Sonic and his friends encounter a new danger, one unlike any other, one that they have never encountered before, yet our blue hedgehog knows what it is. How many secrets is the blue hero hiding and how many will be revealed.
Let's start with one: Sonic transformed into many forms, like his Super and Dark forms. People think they disappear once he uses their powers but what if some of them are still with him? What if he can talk to them?

This story includes my idea of Sonics past and some of my OC's but other than that the rest of the characters belong to SEGA.

Includes Sonadow (and light past Sonally)
Warning: Includes some gore, violence, harm and more (if you don't like blood, just don't read this😅)

WARNING: Includes gore, abuse, swearing, past traumas and themes that may be triggering to some people. Please do not read if you don't like reading such stories. You have been warned.