I did enjoy this book for being part of a tournament ark but the last fight was very certain character gets a power that’s op for one second and wins and spoilers below
It was the female sword lady who has 1 core that can keep up with the main character who has 2 CORES and able to draw in a lot of energy more than her but some how she keeps up while throwing huge attacks at him through out the fight it’s pretty bs imo plus does her blood copy have endless energy just like her ???