Kjókó toppa (Invisible) (S03E10)

Bell and the rest of the Hestia Familia have decided to save the Xenos, helping them escape to Knossos and, through that, the dungeon. Making contact with Fels, who is traveling with the Xenos, helps them steadily advance their preparations. Meanwhile, the Loki Familia, and every other adventurer, is moving to stop them. Adding to all this are Eina, Aisha, Ryu, Hermes...and Ais. On this day, everyone carries their own convictions in their hearts, and the spark that will ignite the battle revolving around the Xenos is struck. (Crunchyroll)