I've heard Omens is a great game, but I've never looked into it much. But I went ahead and looked up the final fight, BOY WAS IT HIDING A GEM! Not only is the song amazing, but I actually think they did a great job with "The Exiled" and his whole story. The lyrics he sings in "Weight of the World" reminded me of The End, and here we are. Enjoy!
A Mashup of "Weight of the World" from the fanmade game Sonic Omens *song made by John R1se, "I'm with You" or "The End" from Sonic Frontiers, and "Break Through it All" from Sonic Frontiers
Weight of the World by John R1se: https://www.youtube.com/watch?v=Rz0cGiWREOQ
Infinite background by LegendQueen01 on DeviantArt
The End photo by MortalKombaChan on Danbooru
The Exiled photo by Chumba on Twitter