That whole final arc felt rushed, honestly. They were building up this huge confrontation with the 'Corrupted Throne' entity for volumes, and then it's wrapped up in maybe three chapters? The protagonist, Argus, uses the 'Brave Soul' technique he's been perfecting, which felt less like an earned victory and more like the author needed a quick way out. It merges the light and dark hadou energies within him, yeah, but the cost—him becoming a sort of stationary guardian statue at the world's edge—came out of nowhere. The epilogue with the side characters visiting years later tries to be bittersweet, but it just left me feeling like the core ideological conflict, the whole 'akugyaku' versus 'hadou' philosophy debate, got sidelined for a symbolic sacrifice. The villain's motivation to erase all conflict by absorbing free will just... dissipates when Argus stops him. No real conversation, just a beam struggle. I reread it thinking I missed something, but nope. The resolution is visually flashy but thematically thin compared to the political intrigue in the middle books.
On a slightly positive note, the actual final image of Argus, petrified but with a faint smile as the seasons change around him, is a strong piece of artwork. It's just a shame the narrative leading to it didn't carry the same weight. It resolves the immediate threat, sure, but doesn't satisfyingly answer the questions the series raised about the nature of a 'brave soul' in a corrupted world. It opts for a clean, permanent sacrifice instead of a messy, ongoing peace, which might be the point, but it didn't resonate with me.