The Churning Rift of the World is Odin Sphere's Boss Rush Mode. It pits you against every Boss you ever fight in the game, including Mid-Bosses, in the order in which you would have encountered them while playing through the story. Upon defeating the last boss you are awarded the Road of Erion trophy.
I was having a bit of trouble with the rendering of this video due to it's length, but breaking it up into smaller parts seemed to do the trick.
Due to the fact that the fights here are scaled up to level 50, I wasn't quite sure what to expect difficulty wise. As such, I ended up over-preparing. A lot.
Before anyone can ask, you get Maury's Bell from Maury as soon as you unlock his final recipe. After that, you can purchase more of them from the Pooka merchant in the Pooka Village for the steep price of 4000 G.
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Outtro Song: Burner
Artist: Gunnar Olsen
License: Royalty Free
*Odin Sphere Leifthrasir was developed by "Vanillaware" and published by "Atlus". I do not own any content pertaining to their Intellectual Property.*
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