Some quests in Nioh 3 are interesting precisely because of the bosses you’ll face at the end. The quest’s plot itself is secondary. And the quest “In Search of Eternal Youth” is exactly like that. In this quest, you’ll face two bosses at once: the One-Eyed Oni & Gaki Boss Fight. It’s an exciting encounter. I also recommend checking out the guide on fighting another interesting boss Ibaraki Doji.

In Search of Eternal Youth

Talk to the ghost in the small hut located west of Arashimaya Shrine, Sagano to unlock In Search of Eternal Youth in game Nioh 3. She will tell you to look for her sons who, she says, are hunting mermaid meat. The next marker will give you a clue as to where to find the two brothers. You need to go to this location, defeat the enemies, and then pick up the clue. The quest will continue after the dialogue ends, and you’ll receive a new marker on the map showing where to go.

The Battle Against One-Eyed Oni & Gaki

Here, you’ll face two bosses at once. What’s more, the battle takes place on the roof of a building, so you’ll have limited room to maneuver. But the good news is that both bosses are very easy to defeat. In my case, I used the Demon of Envy ability while the One-eyed Oni was busy with his own business. Then a few magic shots, and the boss was defeated. As for the second boss, Gaki, he’s no different from a regular enemy.

He just has a health bar, like all bosses. You can defeat him any way you like. You have a large arsenal of magic and Ninja Tools. After defeating the bosses, you need to approach the spirit of their mother, who will appear nearby. She sadly notes that her sons turned into yokai because they ate mermaid meat. After the dialogue, the quest “In Search of Eternal Youth” will be completed, and you will receive a reward.