Mydei is a 5-Star Imaginary character of The Destruction path who debuted in Honkai: Star Rail during version 3.1.

While Mydei is featured as the boosted 5-Star character on his Fiery Lionheart 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 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 Mydei's kit and Eidolons.

On this page:

• Mydei's kit
• Mydei Ascension materials
• Mydei Trace materials
• Mydei Eidolons

Mydei's kit

Mydei is a 5-Star Imaginary character of The Destruction path, and keeping in mind 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.



• 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 - Mydei consumes HP by an amount equal to 50% of hiscurrent HP. Deals Imaginary Damage equal to 45% of Mydei's Max HP to one designated enemy 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 - Mydei consumes HP by an amount equal to 35% of his 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 - Mydei consumes 150 points of Charge and deals Imaginary Damage equal to 140% of his Max HP to one enemy and Imaginary Damage equal to 84% of Mydei's Max HP to adjacent targets. This ability will be automatically used, but while this ability is in use, Charge cannot be accumulated.
• Ultimate: Throne of Bones - Mydei restores HP by 15% of his Max HP and accumulates 20 of his Talent's Charge points. Mydei also deals Imaginary Damage equal to 96% of his Max HP to one designated enemy, and deals Imaginary Damage equal to 60% of Mydei's Max HP to adjacent targets. Additionally, Mydei Taunts the target and targets adjacent to it, lasting for two turns. The next use of 'Godslayer Be God' also prioritizes attacking one designated enemy, but this effect only works on the latest target.
• Talent (passive ability): Blood for Blood - For each 1% of HP lost, Mydei accumulates one point of Charge (up to 200 points), and when Charge reaches 100, Mydei consumes 100 points of Charge to enter the 'Vendetta' state, restoring HP equal to 15% of his Max HP, and advances his action by 100%. While the Vendetta state is active, Mydei's Max HP increases by 50% of his current Max HP, and his defense remains at zero. At the start of Mydei's turn, he automatically uses 'Kingslayer Be King', and when Charge reaches 150 points during his Vendetta state, Mydei immediately gains one extra turn and automatically uses Godslayer Be God. Additionally, when receiving a killing blow during his Vendetta state, Mydei will not be knocked down, but will clear his Charge, exiting the Vendetta state, and restoring HP by 50% of his Max HP.
• 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 points of his Talent's Charge.
• Bonus Trace 1: Bloodied Chiton - When battle starts, if Mydei's Max HP exceeds 4000, for every 100 excess HP, Mydei's Crit Rate increases by 1.2%, his Charge ratio from enemy targets' damage increases by 2.5%, and his Incoming Healing increases by 0.75%. Up to 4000 excess HP can be taken into account for this effect.
• Bonus Trace 2: Thirty Tyrants - While in the 'Vendetta' state, Mydei is immune to Crowd Control debuffs.
• Bonus Trace 3: Earth and Water - During his Vendetta state, Mydei will not exit the Vendetta state when receiving a killing blow. This effect can trigger three times per battle.

Mydei Ascension materials

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

You need to get a lot of Harbinger of Strife and Fear-Stomped Flesh-based materials for Mydei to fully upgrade his capabilities, and 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

Mydei Trace materials

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.

For Mydei, you 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

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Version 3.2 with Castorice and Anaxa is coming next. But for now, in version 3.1 we have Tribbie and Mydei to pull for. So make sure to redeem those new codes for Stellar Jade if you want her 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.

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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.

Here are all of Mydei's Eidolons in Honkai: Star Rail:

• Frost Hones Spine of Steel (E1): The damage multiplier applied by 'Godslayer Be God' to the primary target increases by 30%, and Godslayer Be God becomes Imaginary Damage dealt to all enemies equal to the damage multiplier applied to the primary target.
• Strife Beholds Cry of Dead (E2): During 'Vendetta', the damage dealt by Mydei ignores 15% of enemy targets' defense, and when receiving healing, Mydei converts 40% of the healed amount to Charge. The tally of the converted Charge cannot exceed 40 points, and resets this tally of Charge after any unit takes action.
• 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): While in his Vendetta state, Mydei increases his Crit Damage by 30% and restores HP by 10% of his Max HP, after receiving attacks from enemy targets.
• 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 lowers the Charge required for Godslayer Be God to 100 points.

Good luck levelling up Mydei in Honkai Star Rail!