If you are looking for the turning point or the "hype moment" of the series, Chapter 10 is significant for three reasons:
Kazuki doesn’t hesitate.
He bites his thumb, smears blood on the ring – half his iris turns black. If you are looking for the turning point
Yuria fuses into his shadow. His left arm becomes ethereal, clawed, and covered in ancient runes. Since you want the raw (Japanese text, no
Standing in the moonlight, mud-splattered, he whispers: these are the most reliable sources:
「勇者…お前が女を奪うなら。俺は“歴史”を奪う。」
(Hero… if you take the women. Then I’ll take “history” itself.)
Since you want the raw (Japanese text, no translation), these are the most reliable sources: