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Honkai Star Rail Mydei materials, kit, and Eidolons

Ascension and Trace materials for Mydei.

Mydei's splash art from Honkai Star Rail on a deep blue galaxy background.
Image credit: Eurogamer/HoYoverse

Mydei is a 5-Star Imaginary character of The Destruction path likely coming to Honkai: Star Rail in version 3.1.

While Mydei will likely be featured as the boosted 5-Star character on his Banner in version 3.1, he will eventually return to Honkai: Star Rail at some point in the future when the Banner schedule cycles back to him.

If you want to prepare for him, we've detailed reliable leaks of Mydei's Ascension materials and Trace materials so you can level him up to his full potential right away. To understand how you might play him, we've also detailed what we know about Mydei's kit and Eidolons.

Keep in mind that this is leaked beta information, so Mydei's materials and kit might change upon his official release.

On this page:

Mydei's kit

Mydei is a 5-Star Imaginary character of The Destruction path, and keeping in mind that this is leaked beta information from hakush.in that could change upon his official release, and that all of the percentages mentioned below are based on Level 1 Traces, here's a summary of Mydei's kit in Honkai Star Rail:

  • Element: Imaginary.
  • Path: The Destruction.
  • Rarity: 5-Star.
  • Cropped view of Mydei's splash art from Honkai: Star Rail.
    Image credit: HoYoverse
  • Basic Attack: Vow of Voyage - Deals Imaginary damage equal to 25% of Mydei's attack to a single enemy.
  • Skill: Deaths are Legion, Regrets are None - Consumes HP by an amount equal to 50% of Mydei's current HP. Deals Imaginary Damage equal to 45% of Mydei's Max HP to one designated enemy unit and Imaginary Damage equal to 25% of Mydei's Max HP to adjacent targets. If the current HP is not sufficient, using his Skill reduces Mydei's current HP to one.
  • Enhanced Skill 1: Kingslayer Be King - Consumes HP by an amount equal to 35% of Mydei's current HP. Deals Imaginary Damage equal to 55% of Mydei's Max HP to one enemy and Imaginary Damage equal to 33% of Mydei's Max HP to adjacent targets. If the current HP is not sufficient, using his Skill reduces Mydei's current HP to one. This ability will be automatically used.
  • Enhanced Skill 2: Godslayer Be God - Consumes 150 Charges and deals Imaginary Damage to one enemy equal to 140% of Mydei's Max HP. At the same time, deals Imaginary Damage to adjacent targets equal to 84% of Mydei's Max HP. This ability will be automatically used. While this ability is in use, Charge cannot be accumulated.
  • Ultimate: Throne of Bones - Mydei gains 'Death Proof' for two turns. While in the Death Proof state, Mydei can restore HP by 8% of his Max HP after being attacked. Deals Imaginary Damage equal to 96% of Mydei's Max HP to one designated enemy, and deals Imaginary Damage equal to 60% of Mydei's Max HP to adjacent targets. Additionally, Taunts the target and targets adjacent to it, lasting for two turns.
  • Talent (passive ability): Blood for Blood - For each 1% of HP lost, Mydei gains one point of Charge (up to 200 points). When Charge reaches 100, Mydei consumes 100 points of Charge to enter the 'Vendetta' state, restoring HP equal to 15% of Mydei's Max HP, and advances his action by 100%. While in the Vendetta state, Mydei's Max HP increases by 50% of his current Max HP, and defense remains at zero. Also, at the start of Mydei turn, he automatically uses his 'Kingslayer Be King' enhanced Skill. When Charge reaches 150 points while in the Vendetta state, Mydei immediately gains one extra turn and automatically uses his 'Godslayer Be God' enhanced Skill. When receiving fatal damage while in the Vendetta state, Mydei clears his Charge and exits the Vendetta state, restoring HP by 50% of his Max HP. For each 100 points of Mydei's Max HP beyond 6000 points, the Charge Mydei receives from enemy targets' damage increases by 1.66%, and his Incoming Healing increases by 0.5%, tallying up to 6000 HP in excess.
  • Technique (overworld ability): Mydei pulls in enemies within a certain area and inflicts Daze on them for 10 seconds. Dazed enemies will not actively attack ally targets. If actively attacking Dazed enemies, when entering battle, Mydei deals Imaginary Damage equal to 80% of his Max HP to all enemies, and Taunts the targets, lasting for one turn. Mydei also accumulates 50 Talent's Charge points.
  • Bonus Trace 1: Bloodied Chiton - When battle starts, if Mydei's Max HP exceeds 5000, for every 100 excess HP, increases his Crit Rate by 1.6%, up to a max increase of 48%.
  • Bonus Trace 2: Thirty Tyrants - While in the 'Vendetta' state, Mydei is immune to Crowd Control debuffs.
  • Bonus Trace 3: Earth and Water - If Mydei has 'Death Proof' while in the Vendetta state, he will not exit the Vendetta state when receiving fatal damage. His current HP can be reduced to a minimum of one.

Mydei Ascension materials

Menu view of the Harbinger of Strife material in Honkai Star Rail.
Harbinger of Strife. | Image credit: HoYoverse

You need to use Mydei Ascension materials to upgrade stats like his health, attack, defence, and Critical hit effectiveness.

With the latest beta information sourced from honeyhunterworld, it looks like you need to get a lot of Harbinger of Strife and Fear-Stomped Flesh-based materials for Mydei to fully upgrade his capabilities.

In total, the Mydei Ascension Materials in Honkai: Star Rail are:

  • x15 Fear-Stomped Flesh
  • x15 Courage-Torn Chest
  • x15 Glory-Aspersed Torso
  • x65 Harbinger of Strife
  • 308,000 Credits

For more details, here's what Mydei Ascension materials you need per level:

Mydei Ascension level Mydei Ascension materials Credit cost Reward
Level 20 x5 Fear-Stomped Flesh 4,000 x1 regular Star Rail Pass
Level 30 x10 Fear-Stomped Flesh 8,000 None
Level 40 x6 Courage-Torn Chest, x3 Harbinger of Strife 16,000 x1 regular Star Rail Pass
Level 50 x9 Courage-Torn Chest, x7 Harbinger of Strife 40,000 None
Level 60 x6 Glory-Aspersed Torso, x20 Harbinger of Strife 80,000 x1 regular Star Pass
Level 70 x9 Glory-Aspersed Torso, x35 Harbinger of Strife 160,000 None

Remember, this is leaked beta information that could change upon Mydei's official release.

Mydei Trace materials

Menu view of the Borisin Teeth material in Honkai Star Rail.
Borisin Teeth. | Image credit: HoYoverse

Just like Ascension, to get the most out of using Mydei you will have to level-up his attacks and passive abilities by using Trace materials, which vary from character-to-character.

With thanks to honeyhunterworld again for sourcing the information, for Mydei it looks like you'll need to use a lot of Borisin Teeth and Fear-Stomped Flesh-based materials to fully upgrade his capabilities.

In total, to upgrade all of his abilities, the Mydei Trace Materials you need are:

  • x8 Tracks of Destiny
  • x12 Auspice Sliver
  • x18 Borisin Teeth
  • x41 Fear-Stomped Flesh
  • x56 Courage-Torn Chest
  • x58 Glory-Aspersed Torso
  • x69 Lupitoxin Sawteeth
  • x139 Moon Rage Fang
  • 3 million Credits

Once again, this is leaked beta information, so Mydei's materials could change upon his official release.


Version 3.0 with The Herta and Aglaea is here! So make sure to redeem those new codes for Stellar Jade if you want them or future characters - and check out our regularly updated tier list. For everything else, we have pages on the next Banner, Ministry of Education quiz answers, and how to get more Star Rail Passes.


Mydei Eidolons

By getting duplicates of Mydei from Warping on his Banner, you will receive his Eidolon. This material allows you to unlock Eidolon levels, with each upgrade either improving an existing attack or passive ability.

Drip marketing for Mydei in Honkai Star Rail.
Image credit: HoYoverse

With beta information sourced from hakush.in, here are all of Mydei's Eidolons in Honkai: Star Rail:

  • Frost Hones Spine of Steel (E1): While in the 'Vendetta' state, the damage dealt by Mydei ignores 15% of enemy targets' defense. And each time healing is received, 40% of the healed amount will be converted into Charge based on Mydei's Max HP.
  • Strife Beholds Cry of Dead (E2): 'Godslayer Be God' becomes Imaginary Damage dealt to all enemies equal to the damage multiplier applied to the primary target.
  • Honor Exalts Feast of Faith (E3): Increases the level of Mydei's Skill by two with a maximum upgrade level of 15, and increases the level of his Basic Attack by one, with a maximum upgrade level of 10.
  • Siren Jolts the Laconic Lion (E4): When 'Death Proof' takes effect, additionally restores HP equal to 10% of this unit's Max HP.
  • War Chisels Flesh of Flame (E5): Increases the level of Mydei's Ultimate and Talent by two, with a maximum upgrade Level of 15.
  • Legacy Scales Mound of Blood (E6): When entering battle, Mydei immediately enters the 'Vendetta' state, and the Charge required for 'Godslayer Be God' is lowered to 100 points.

Good luck levelling up Mydei in Honkai Star Rail!

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