Ep 19 – “The Lugru Corridor” / “Rugurū Kairō” (ルグルー回廊) 

While en route to the World Tree, the pair first pass through a large cave. Leafa receives a message from Recon cautioning her to take care. She and Kirito realize that they are being followed, only to be cornered by a large group of Salamander players. Kirito asks Leafa to support him with her magic while he fights the group by himself. However, he is unable to break their formation until Yui comes up with a plan to have Leafa cast some protective magic on Kirito, while he conjures a spell that temporarily transforms him into a representation of Gleam Eyes. In his new form, Kirito obliterates his enemies, but spares one whom Kirito bribes in exchange for information. The Salamander player reveals that his party was ordered to attack Kirito and Leafa by the same group which attacked them during their first encounter.