What chapter-level takeaway best explains why "Battling Grade Six Demons" matters for Damon?

Chapter 124, "Battling A Grade Two Mana Beast II", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is The fight with the Obsidian Drake raged on, its thick, scaled body..., but the pressure keeps building through Fenrir, Cerbe, and Aquila kept the beast occupied, each taking turns....

Chapter 233, "The Demons", is the clearest early answer because it turns Robin's situation into a concrete plot event.

Chapter 880, "Battling as an owner", is the clearest early answer because it turns Hey Evergreen's situation into a concrete plot event.

Chapter 355, "My Throne", is the clearest early answer because it turns Demons's situation into a concrete plot event. The setup is Do not you DARE throw their weapons!, but the pressure keeps building through This is your homeland, and your families are behind you depending on....

Chapter 645, "Offer", is the clearest early answer because it turns Demons Emperors's situation into a concrete plot event.

Chapter 997, "Battling the Imperial Guards alone", is the clearest early answer because it turns Marshal's situation into a concrete plot event.

Chapter 818, "Battling the two marshals", is the clearest early answer because it turns Boom Richard's situation into a concrete plot event.

Chapter 359, "Dealing With Merging Demons", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is Damien's feet slammed into the earth like a warhammer crashing from..., but the pressure keeps building through His staff hit first—glowing red from condensed mana, streaking down....

Chapter 350, "Two Against Demons", is the clearest early answer because it turns Arielle's situation into a concrete plot event. The setup is The wind carried the scent of ash now., but the pressure keeps building through Arielle stood at the cliff's edge near the outpost, the forest....

Chapter 514, "Luton At Grade Two", is the clearest early answer because it turns Luton's situation into a concrete plot event. The setup is Luton's body expanded one final time and then compressed violently..., but the pressure keeps building through For a split second, its form became perfectly spherical, light....