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    Home»Guides»Mu Xiaokui Boss Fight Guide – Phantom Blade Zero
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    Mu Xiaokui Boss Fight Guide – Phantom Blade Zero

    By SinigaNovember 6, 2026No Comments6 Mins Read
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    The boss Mu Xiaokui, also referred to as Young Mistress, is a very tough boss in the Phantom Blade Zero whom you must defeat in order to advance to the next region. She will engage you in a battle that consists of three distinct phases. In this guide, we’ll go over the best build to use against her and explain how to deal with each phase, including the secret third phase, so you can defeat her and claim your rewards.

    Best Build to Fight Mu Xiaokui

    This build will focus on disarming Mu Xiaokui’s guard using the Outlaw Warblade. The White Serpent & Crimson Viper allows you to instantly strike whenever Mu Xiaokui gives you an opening to do so. Also, the Outlaw Warblade has the ability to recover some HP by attacking enemies who have an affinity towards healing. Heartrend Pipa allows you to deal unblockable damage and to lower Mu Xiaokui’s Sha-Chi. Meanwhile, the Kuye Temple Prayer Beads allow you to summon Bronze Men which will keep Mu Xiaokui occupied and give you enough time to recover.

    When it comes to accessories, you need to wear Shenji’s Ring and Resonance Talisman for increased efficiency in fighting Mu Xiaokui because of her constant attacks. With Reflex Device, you will be able to perform parries and Perfect Dodges more often. Meanwhile, the Token of Pursuit increases your damage against enemies who have disarmed guards. Kuye Dew is important for both decreasing your damage taken and for slow healing.

    How to Defeat the Young Mistress

    Young Mistress is a boss in Phantom Blade Zero, which should be beaten in order to unlock a new area. The battle includes three stages, each requiring a specific strategy. The first stage is rather easy; however, the second stage might be particularly hard due to the amount of blocks that should be parried.

    Before going into battle, ensure that your character is prepared by upgrading your Reflex Device and accessories, as well as bringing your favorite weapon or bleeding build. You can also use the Jack of Steel during this battle.

    The good news is that you don’t have to repeat the entire fight if you die during a later phase. You can continue from the phase where you died, making the fight easier to complete with each attempt.

    Young Mistress Phase 1

    The first stage will be the easiest one in the battle. Instead of parrying all attacks, try dodging and maintaining distance from the Young Mistress.

    Pay attention to the red flash that will appear and allows you to dodge her attacks. After dodging the attack, you can attack her and damage using either bleed build or your weapon. Some attacks of hers can be parried, such as waves of projectiles, but dodging them is recommended when you have trouble.

    Be patient and keep doing this cycle. Try not to attack for additional damage because it is better to be safe and damage her health bit by bit. 

    Do not summon your allies at the beginning of the stage and wait for the right moment. Summoned allies will give you additional damage and help finish her faster. Unlike other bosses’ battles, in this one you need to kill the Young Mistress in the first stage.

    Young Mistress Phase 2

    This stage is probably one of the most difficult aspects of the entire conflict. In this round, you will have to use parries quite often; therefore, you should be prepared for that and update your Reflex Device along with accessories prior to the battle.

    The Young Mistress still employs projectile waves as well as red flash attacks. You will have to watch for red flash, evade the attack and strike back when you get an opportunity. Yet, the main difficulty of this stage lies in the additional opponents the girl produces.

    They behave differently and attack in different manners: one jumps at you and tries to pounce on you, and the other comes with a sword. The jumping monster can deal some serious damage to you and even reduce your Chi.

    Here’s how to deal with them:

    • Jumping entity: Dodge its pouncing attack instead of trying to parry it.
    • Sword-wielding entity: You can parry its attack to avoid damage.
    • Projectile waves: These can also be parried if you’re comfortable with the timing.
    • Grab attack: Watch carefully for the Young Mistress’s grab and dodge before it connects.

    Always stay away and do not allow yourself to get surrounded by a lot of attacks.

    The summon attacks are not really helpful in damaging the Young Mistress in this phase, but they do help in giving you a breather. Use them if you want to gain back your health or restore your Chi. You do not have to bring down her health totally in this phase since the battle will automatically move on to the next phase.

    Young Mistress Phase 3

    Phase Three has another enemy in addition to the Young Mistress, which complicates the battle even further. Nonetheless, this phase will be easy for you after learning how to manage both of the enemies. Parrying the attacks is possible; hence, concentrate on the timing, but not on avoiding all attacks.

    An essential strategy in this fight is locking on to an enemy. Changing targets from one to the other when both of them are attacking will complicate the battle. Focus on the Iron Fiend. Locking your target will help you easily monitor the health of your target and control the fight. Parrying the attacks continuously and dodging the red flash attack of the Young Mistress is key in this battle. When you dodge her attack successfully, make sure to strike back.

    These will be of some use to you in this phase; however, these will be useful mainly in terms of allowing you to rest or get yourself back together if you are low on health. The trick to this phase is staying relaxed and concentrating on fighting the enemies one by one. Don’t get worried if your health is low. Just keep looking for chances to parry.

    Final Quick-Time Event

    But even after beating them, the battle is not entirely over because there is one more quick-time event for the Young Mistress that you will have to do in order to win the battle. This quick-time event can be done in some time, so just concentrate until you defeat her.

    Young Mistress Boss Fight Rewards

    Beating the Young Mistress fight is definitely worth the challenge. As your reward, you will unlock access to the next region, as well as receive two excellent weapons. Sure, the fight may prove challenging for you, particularly in the second phase. But with the right timing of dodges, parries, and attacks, you will have an easier time. Just take your time and tackle the fight phase by phase.

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    Siniga

      A passionate gamer and writer who believes gaming is more than just a hobby - it’s my second life (and sometimes my escape from the first!). I love exploring new worlds, chasing good stories, and turning my gaming adventures into words for fellow gamers.

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