Nioh and Nioh 2 (including all DLCs) are also bundled in the Nioh Collection on PS5.
The mission begins when Ii Noamasa asks William to go hunt some demons. While he would like to go with him, unfortunately – he has things to do. Thus, William is sent on another errand to go some demon culling alone in the Kinki Region.
Sub Mission – Demon Hunting Walkthrough
Remember the battleground you faced Tachibana Muneshige on? That’s your starting point. In the middle of all the grass, you’ll spot the shrine right up ahead. Activate the shrine for a check point before making entering the pathway in between the two rocks.
Follow the pathway down until you reach a hill with several Revenant Blades sticking out from the ground. Upon entering the battle field, an Oni-bi and a sword-wielding demon will appear. Kill the Oni-bi first to coat your weapon in demon fire before slaughtering the sword-wielding yokai.
However, there’s not only one Oni-bi. Several Oni-bi will spawn with the sword-wielding yokai chasing after you. While fighting it, make sure you don’t run into another yokai realm portal. The place is surrounded with it.
After killing those, there’s another bout with a dual sword-wielding yokai that will drop out of nowhere. Kill it and proceed through another pathway in between two ledges.
When you reach the other side, the field is a bigger plain with more Revenant Blades impaled into the ground. Also, you’ll spawn two sword-wielding demon upon arrival. Take them out one by one and you shouldn’t have a problem right after.
However, the bout after those two now has two flaming wheels and a water Oni-bi. Kill the wheels one at a time and watch out for the charging flame attack. When you’re done with those two, you can kill the water Oni-bi. Or, you can kill the water Oni-bi and then use the enchantment to take out the two flaming wheels. After that, head out through the path until you reach a lake.
When you reach the lake, you’ll meet an old face. Remember the second boss from Isle of Demons? He’s back and angrier! Accompanied with two water Oni-bi, he’ll come at you with his twin wrecking balls. Dodge and lure out his attacks before coming close to strike him. Just like how he was in the ship in the Isle of Demons, anticipate his patterns and kill him.
When he goes down, you’ll get a notification that you’ve finished the mission!