How to Beat the Demon of Obsession in WUCHANG: Fallen Feathers

The Boss Most Players Never Find

The Demon of Obsession is a secret boss in Chapter 5, and I mean genuinely secret. Most players will finish the game without knowing it exists. There’s no map marker, no NPC hint, and no quest tracker pointing you toward it. You have to complete two separate multi-step questlines across the entire game, obtain a specific item, and then deliberately give the wrong answer at a riddle door—the opposite of what the game trains you to do.

If you’re reading this guide, you’re already ahead of 90% of the playerbase.

How to Unlock the Fight

This is the hard part. The actual combat encounter is tough but fair. Getting there requires you to have done everything right across multiple chapters.

Step 1: Complete He Youzai’s Questline

He Youzai’s quest runs from Chapter 2 through Chapter 5. You need to talk to him at every location he appears, complete his requests, and make choices that keep him alive through the end of his storyline. Missing a single interaction point can break the quest permanently.

The full questline is covered in the NPC quest guide, but the short version: find him in Cloudspire, follow his dialogue through Mt. Zhenwu and the Bo Capital, and make sure you complete his final request before entering the Depths of Capital. He gives you one half of the Ring of Samsara upon completion.

Step 2: Complete Fang Yao’s Questline

Fang Yao’s quest is even longer and more involved than He Youzai’s. She first appears in Chapter 1 and her storyline stretches through the entire game. Like He Youzai, missing a trigger point means her quest fails silently.

Complete her full chain and she gives you the other half of the Ring of Samsara.

Step 3: Combine the Ring

With both halves, the game automatically combines them into the complete Ring of Samsara in your key items inventory. You need this ring before proceeding to the third riddle door.

Step 4: Choose the Wrong Answer at the Third Riddle Door

The third riddle door is in the Depths of Capital (Chapter 5). Normally, you’d pick the correct answer—“The Grand Dream Fades”—to receive the standard rewards. But with the Ring of Samsara in your inventory, choosing the wrong answer opens a hidden path instead of a punishment.

This is completely counterintuitive. The game has trained you across two previous riddle doors that wrong answers mean losing rewards or facing penalties. Here, the wrong answer is the key.

The hidden path leads to a sealed chamber where the Demon of Obsession waits.

The Fight

The Demon of Obsession is a Chapter 5 boss, so expect end-game damage numbers and a large health pool. It’s a grotesque, multi-limbed creature that represents obsessive attachment—fitting, given how obsessively you had to play to get here.

Phase 1 Attacks:

Grasping tendrils — Multiple tentacle-like appendages sweep across the arena in overlapping patterns. The timing between each tendril is staggered, so you need to dodge each one individually. Rolling through the first and then standing still will get you hit by the second.
Obsession aura — The Demon periodically emits a purple field that applies a unique debuff: your Skyborn Might generation drops significantly. This forces you to rely on basic attacks and consumables rather than weapon skills. Stay outside the aura when it appears—it pulses and then dissipates after about five seconds.
Lunging bite — Charges forward with its primary maw open. Massive damage, moderate tracking. Dodge sideways late, not early—it adjusts mid-charge.

Phase 2 (Below 50% Health):

Illusion clones — The Demon splits into three copies. Two are illusions that shatter after one hit each, but the real one is mixed in. The illusions have a slightly different color tint—look for the one that’s marginally darker. If you can’t tell, just hit all three quickly with an AoE weapon skill to clear the fakes.
Obsession chains — Ethereal chains shoot from the ground and root you in place for two seconds. The chains target your position when they’re cast, so keep moving and don’t stand still during this phase.
Berserk combos — Six to eight hit strings that cover a wide area. The final hit in each combo has a long telegraph—a full-body wind-up before a ground slam. That final hit is your dodge window, and the recovery after it is your biggest damage opportunity.

Strategy

Weapon choice matters here. The Obsession aura that cuts your Skyborn Might generation makes spell-heavy and weapon-skill-heavy builds weaker than usual. I recommend physical damage builds with reliable basic attack combos.

Dual Blades work well because the Clash mechanic doesn’t depend on Skyborn Might, and the fast attack speed lets you capitalize on the short windows between tendril sweeps.
Axe with Rampage is strong because the lifesteal operates on basic attacks, countering the Demon’s chip damage from the aura.
Spear is serviceable for the range advantage, but the Demon moves erratically in phase 2, making it hard to maintain optimal spacing.

General tips:

Kill the illusion clones fast. The longer they’re alive, the harder it is to track the real Demon’s attacks. Use an AoE ability the moment you see the split.
Don’t chase the Demon into its own aura. Impatient players rush in for damage and end up inside the Skyborn Might debuff field, crippling their offense for the next several seconds.
Save your consumables for phase 2. Phase 1 is manageable with basic healing. Phase 2 is where damage spikes and the chains catch people off guard. Keep at least half your Manna Vase charges for the second half.

Rewards

The Demon of Obsession drops the Obsession Echo, one of the strongest spell echoes in the game, plus a significant amount of Impetus. You also get a unique trophy/achievement that fewer than 5% of players will earn.

More importantly, defeating it contributes to the conditions for the “Dream’s Sweet Deceit” ending path. If you’ve come this far, you’re likely going for a completionist run anyway.

Don’t Beat Yourself Up If You Missed It

Seriously. Both He Youzai and Fang Yao’s questlines have trigger points that disappear permanently as you progress. If you missed one interaction in Chapter 2, the Demon of Obsession is locked out for that playthrough. That’s why NG+ exists—and on a second run, knowing where every NPC appears makes the setup much more manageable.