Overview
- Ubisoft says the event runs through December 22, 2025, though one outlet reports a December 15 end date.
- Players who have unlocked Yasuke can start the quest for free by meeting the quest giver northeast of Yamashiro.
- Naoe and Yasuke investigate a cult, forbidden rituals, and a monstrous transformation in the Crystal Cave location.
- Completing the mission grants an exclusive katana and items found in hidden chests, while optional paid packs add Titan- and Mikasa-inspired outfits, weapons, and a Survey Corps mount.
- The update also introduces the "A Puzzlement" story drop with a new environmental puzzle and swapped signature skills, and the event window includes the Nintendo Switch 2 launch on December 2.