Rygar Mythos

(Note: To understand the 2nd half of this description, id recommend reading Caesar Hellwalker's description as well)   

Rygar Mythos is a Tabaxi Bard born and raised in Oreskos in Theros. He was often considered the "runt" of the Leonin factions, not really fitting in anywhere, He was eventually ousted out of Oreskos by a particularly nasty faction of Leonin, and eventually he settled down in the coastal town of Neolantin. Then, one day as he is appreciating the view off the dock, he notices a crashed boat with 3 adventures, who he saves and takes under his wing. A grand adventure with many twists and turns ensues, with Rygar eventually making his way back to Oreskos, and confronting his past, and uncovering the dark secrets of not only the group of Leonin who exiled him, but also uncovering the plots of one the theran gods themselves. After being declared one of the heroes of theros alongside the 3 adventurers he saved before, he and his 3 adventuring companions is granted demi-godhood by the theran gods, essentially giving him immense power & immortality. 

505 years of relative peace pass, and after following a lead about his mostly resolved past from a seemingly random hunch, ends up in a completely alien realm, he quickly realizes that whatever is going on here, that time itself seems about to deconstruct due to a fight happening somewhere. He goes to check it out, but ends up losing control of his body to an evil hivemind calling itself "Adrian Finol" A group of 5 adventures end up saving him, including Caesar Hellwalker, who ends up sacrificing himself by swapping souls with Adrian (who is in Rygar's body) to save this group of adventurers. Caesar's soul is quickly deteriorating due to being erased from time due to using the last of his control over Rygar to open the door at the end of the room, creating a time paradox that stops him from ever being created. Rygar regains control over his body, and in a act of pity on the 4 adventures possibly becoming stranded in a obsolete timeline, using almost all of his magic capabilities to warp the group of 4 and him to the new timeline created by the change, leaving his previous life and possible impact behind. He lets off the 4 adventurers somewhere in the new timeline, and then ends up getting captured by the remains of society, specifically a group called the order of the eye in the new timeline.

(Rest of description is continued in Rohan Zaxin's description)