Mu Xiaokui 3rd Phase: How to Beat Iron Fiend & Jade Dancer

Most players beat Mu Xiaokui in two phases, watch the credits of the fight roll, and walk away thinking that was the whole battle. It wasn’t. Hidden behind a side quest is a third phase — a synchronized two-on-one against her guardians, Iron Fiend and Jade Dancer — and it gates one of the best weapon rewards in the game. This page goes deep on that phase alone: the exact trigger, the attack patterns, the checkpoint behavior, and the payoff. For the full fight including her first two phases and the ribbon hunt, see our Mu Xiaokui boss guide.

How Do You Unlock Mu Xiaokui’s 3rd Phase?

Two conditions, both strict, per Game8:

1. Finish the Young Mistress questline before the fight — that means all five ribbons scattered across the Village of Lu, with Mu Xiaokui’s own ribbon examined.
2. Drain her first two health bars. Only then does she call her guardians in.

Skip the ribbons and the fight ends after the Queen of Iron and Jade with no warning that anything was missing. There is no post-fight retroactive unlock on that playthrough — the phase and its exclusive rewards are gone. On a repeat run, sweep the ribbons early; the quest’s memories literally introduce both guardians before you ever swing at them. The boss order guide tracks where this fight sits in the campaign.

How Does the 3rd Phase Change the Fight?

Mu Xiaokui steps back and heals as both guardians drop in together — two health bars on screen at once. Launch-week community reaction got it right: these are not two independent bosses. Their strings are choreographed around each other — simultaneous strikes that force you to defend against both at the same time, and combined attacks with a rhythm all their own.

Two structural facts make the phase more manageable than it looks. Both guardians carry far less Sha-Chi than Mu Xiaokui, so a few clean counters break their guard quickly. And the fight obeys a merciful checkpoint rule: progress is saved by phase, so dying restarts you at the guardian phase — never back at phase one. Reaching phase three is the hard part; beating it is retries.

Iron Fiend and Jade Dancer: Attack Patterns Decoded

Game8’s strategy guide breaks the duo’s kit down to five rules, and they hold up:

• Bring high Guard Break and hold block. The Outlaw Warblade is Game8’s listed pick. Block through their flurries until one staggers, then strike back — and use the Kuye Temple Prayer Beads’ Bronze Men to pull aggro when you need space.
• Maximize your Sha-Chi pool with the Resonance Talisman and Shenji’s Ring so joint strikes never break your guard.
• Keep both in your field of vision. Reposition constantly with directional dodges; never let them trap you between their bodies.
• Focus one guardian first. Game8 finds it easier to isolate Iron Fiend, whose aggressive moveset creates openings while Jade Dancer catches up — other walkthroughs argue for killing Jade Dancer first. Either way: one target, never two.
• Parry the combined attack. When the pair are close, watch for prominent purple effects around Jade Dancer’s blade — a three-hit combined string that ends with a parryable blue-glint attack. Catch the rhythm of the first two hits, parry the third, and Ghoststep counter. Both bosses also use solo versions of the same string.

Then there are the four red-glint grab attacks — undodgeable-if-grappled moves you must evade on the flash:

Dodge the flash, Ghoststep in, and punish. Iron Fiend’s Surprise Kicks is the phase’s most dangerous move — almost no startup cue, so give it your full attention.

Rewards: Fiend Saws, Fist Fragment: Core, and Puppet No. 44’s Eye

The reward stack lands all at once, per Game8 and verified in video breakdowns:

• Fiend Saws — formerly Jade Dancer’s blades. Their surge makes every attack unblockable for a short window, which is why this phase is the only route to one of the game’s most aggressive weapons.
• Fist Fragment: Core — a component of the Worldbreaker Fist, the assembled temper material for the Iron Gauntlets.
• Puppet No. 44’s Eye — a story item you need for the gate out of the village anyway.

Per the video record, rewards arrive stacked — and because checkpoints stick, even a messy first attempt can end in the full drop table on the retry.

Common Mistakes in the 3rd Phase

• Splitting damage. Two half-health guardians are far deadlier than one corpse and one duelist; focus fire ruthlessly.
• Tunnelling on Iron Fiend’s startup-less kicks. If you cannot read Surprise Kicks yet, fight at mid-range until the rhythm clicks.
• Panicking the first time both health bars appear. The phase looks like a difficulty spike and plays like a rhythm check — block, parry the blue glint, dodge the red one.

FAQ

How do you unlock Mu Xiaokui’s 3rd phase?

Finish Young Mistress — all five ribbons — before the fight, then clear her first two phases. Without the ribbons the fight ends at phase two, permanently for that playthrough.

Is Mu Xiaokui’s 3rd phase harder than phase two?

Differently hard: two choreographed movesets at once instead of one fast one. Once a guardian falls, the remainder plays like a standard duel.

Which guardian should you kill first in Mu Xiaokui’s 3rd phase?

Game8 says isolate Iron Fiend; other guides say kill Jade Dancer. Agreed rule: focus one target, keep the other in vision, and never split damage.

What does Mu Xiaokui’s 3rd phase drop?

The Fiend Saws, Fist Fragment: Core for the Worldbreaker Fist, and Puppet No. 44’s Eye — all awarded together when the second guardian falls.

Sources

• Game8 — How to Unlock and Beat Iron Fiend and Jade Dancer
• YouTube — How To Get The Fiend Saws | Mu Xiaokui Secret Phase & All 5 Ribbons
• HowToVideoGame — Phantom Blade Zero: How to Beat Mu Xiaokui
• Game8 — Use It Against Them Walkthrough (Young Mistress & Phase 3 Rewards)

Target-priority sources disagree: Game8 recommends isolating Iron Fiend first, while HowToVideoGame recommends killing Jade Dancer first - both agree on single-target focus, and the article presents both. Phase-level checkpoint behavior verified against the video record; per-move damage values: community mapping in progress.