Log Horizon: Entaku Houkai

Synopsis

Crusty is rescued by Kanami's party and they are attacked by Yourei, Elias and a Raid Boss also under her control. While Leonardo faces Elias alone, Crusty fights Yourei, who is revealed as the Genius Papus, and Kanami fights and defeats the raid boss with the rest of her party and help from the Lelang Wolf Cavalry Guild. During their fight, Crusty remembers that he was cursed by the Genius Bucaphi after refusing to become his vessel and sacrifices some of his own memories to power up his attacks while taking advantage of some loopholes on the curse to counter their effects and destroy Papus, while Leonardo convinces Elias that his incapacity to kill others is not a curse, but a sign of how he values the lives of others and breaks him free from Papus' brainwashing. After the battle, Crusty joins Kanami's party and they continue their journey back to Yamato. After the puppet show, Shiroe realizes that the Geniuses originate from the Moon Server and like Crusty, starts thinking on a way to take the fight to them.

(Source: Wikipedia)