Arc 15The Final Descent
Moros prepared for the Herrscher of the End while Dr. Mei readied Moth to Fire and the Flame-Chasers for the lunar battle. The Herrscher of the End arrived at New Atra and overwhelmed its defenses, leaving the infiltration plan as a faint hope.
- Sakura reunited with Ling, who chose to train with Mobius, while Kevin arrived at the laboratory and Dr. Mei secretly ordered Ling monitored.
- Dr. Mei expelled Elysia and Eden from Moth to Fire after revealing Elysia was the Herrscher of the Origin, and Moros took them aboard the Paris after their farewell ball.
- Moros strengthened himself with Soul Armor, a Magic Well Potion, more than 140 spell scrolls, and a ritual that transformed him into a Vampire Lord.
- As the Thirteenth Great Collapse began, Honkai Beasts attacked cities worldwide, and Moth to Fire and Moros's allies fought to defend them.
- Moros agreed to join Moth to Fire on the Moon, gathered more than 1.2 million undead, and sent his fleet toward New Atra as Dr. Mei launched the Ark.
- Moros deployed his undead at New Atra while Dr. Mei prepared the Moonlight Throne and Flame-Chasers for the Herrscher of the End's descent.
- The Herrscher of the End appeared above New Atra and destroyed its reactors and defenses, while Moros concluded that a war of attrition could not defeat her.
- Kevin and the Flame-Chasers attacked the Herrscher of the End, but her shield stopped them and a single ray killed most of the Second-generation company, and Dr. Mei learned that Pardofelis had reached the infiltration position.