Latest Mydei Build Guide, Light Cone, Relics & Team

The 5-star Imaginary character from the Destruction Path, Mydei, is finally making his debut in the second half of the HSR 3.1 banner.

If you’re looking to build a team around Mydei and unlock his full potential, don’t miss out on this guide. Here, we’ll provide you with detailed information about Mydei's build, including Relics, Trace priority, Light Cones, and best team compositions.

Keep reading to maximize the power of Mydei and elevate your adventure experience!

 

Mydei Overview

Mydei is a high HP berserker mechanic. He gains Charge Points by losing HP. Once fully charged, he enters "Vendetta" state, automatically unleashing Enhanced Skill attacks for high damage. His Undying Mechanic further boosts survivability, allowing him to stay in combat longer. 

Simply stacking HP provides damage boosts, healing, and additional buffs, making him extremely low-maintenance. With minimal manual input required, he is a highly efficient auto-battle DPS.

Playstyle

As an Imaginary character of the Path of Destruction, Mydei refined high-risk, high-reward gameplay by trading his HP for explosive damage like Blade. Mydei’s kit revolves around self-sacrifice mechanics, turning his survivability into pure offensive power.

Mydei thrives on HP consumption and Charge management, transforming his HP into devastating Imaginary DMG. All Mydei's abilities scale with Max HP.

Additionally, when Mydei's Charge bar is filled up, he will enter the "Vendetta" state, advancing his action by 100%, boosting Max HP by 50%, and unlocking the auto-cast nuke.

Additionally, when Mydei's Charge bar is filled up, he will enter the "Vendetta" state, advancing his action by 100%, boosting Max HP by 50%, and unlocking the auto-cast nuke. While in the “Vendetta” state, Mydei will not exit the state when receiving a fatal hit. This effect can trigger up to 3 times per battle.

If Mydei has captured your interest, now is the perfect time to acquire him! LDShop offers exclusive HSR top-up, featuring substantial discounts and limited-time deals to help you secure this top-tier DPS character without the uncertainty of the 50/50 chance.

 

Trace Priority

Let’s start with a quick overview of each skill’s effects.

Skill: Sacrifices HP to deal Swirl Damage. In "Vendetta" state, it auto-activates and enhances. At 150 Charge Points, unleashes "Godslayer Be God."

Ultimate: Deals Swirl Damage, restores HP, gains Charge, and forces Taunt, ensuring the next "Godslayer Be God" hits the target.

Talent: Losing HP builds Charge Points. At 100, enters "Vendetta" state, restoring HP, advancing action 100%, and gaining control immunity. Max HP increases, Defense drops to 0, and cannot be knocked out.

Mydei enters "Vendetta" state by accumulating a percentage of HP lost, automatically unleashing "Kingslayer Be King" to deal Swirl Damage. While in "Vendetta" state, he can further accumulate HP loss percentage to charge his Talent, enabling "Godslayer Be God," which grants an extra turn and delivers massive multi-target damage.

Therefore, the recommended skill leveling priority is: Skill > Ultimate ≥ Talent > Basic Attack.

 

Light Cone for Mydei

1. Best Choice

Flame of Blood, Blaze My Path

• Increases the wearer's Max HP by 18% / 21% / 24% / 27% / 30% and Incoming Healing by 20% / 25% / 30% / 35% / 40%.

• When using Skill or Ultimate, consume HP equal to 6% / 6.5% 7% / 7.5% / 8% of the wearer's Max HP and increase the DMG dealt by this attack by 30% / 35% / 40% / 45% / 50%.

• If this effect's consumed HP is greater than 500, this attack's DMG additionally increases by 30% / 35% / 40% / 45% / 50%.

• If the current HP is not sufficient, this effect reduces the wearer's HP down to 1.

Mydei’s signature Light Cone grants Max HP boost, increased healing received. Bonus damage based on HP lost, perfectly aligning with his high HP scaling and self-damage mechanics.

Using a Skill or Ultimate triggers the Light Cone’s HP-loss-based damage boost, which applies directly to the current attack. Given Mydei’s heavy reliance on Skill damage, this effect remains consistently active, ensuring high damage output.

The stat distribution is well-balanced, providing all essential attributes, accelerating Talent charging, and amplifying Skill burst damage through HP-loss scaling. As a result, his signature light cone is the best and most synergistic choice for Mydei.

2. Great Alternatives

The Unreachable Side

• Increases the wearer's CRIT Rate by 18% / 21% / 24% / 27% / 30% and increases their Max HP by 18% / 21% / 24% / 27% / 30%.

• When the wearer is attacked or consumes their own HP, their DMG increases by 24% / 28% / 32% / 36% / 40%.

• This effect is removed after the wearer uses an attack.

This Light Cone directly increases Crit Rate and Max HP, making it comparable to Mydei’s signature light cone. Its HP-loss-based damage boost ensures high uptime, perfectly fitting Mydei’s playstyle. As a result, this Light Cone serves as an excellent budget alternative to his signature light cone.

3. Best Free Option

Ninja Record: Sound Hunt

• Increases the wearer's Max HP by 12% / 15% / 18% / 21% / 24%.

• When losing or restoring this unit's HP, CRIT DMG increases by 18% / 22.5% / 27% / 31.5% / 36%, lasting for 2 turn(s).

• This effect can only trigger once per turn.

This Light Cone can be freely obtained up to Refinement 5 through events, offering high Max HP and Crit Damage bonuses. Although its HP base value is slightly lower than that of 5-star Light Cones, the 24% HP bonus helps offset the difference. For players prioritizing a 1+0 pull or F2P players, this 4-star Light Cone is the best choice.

4. Optimal 4-star option

A Secret Vow

If you miss the event Light Cone, A Secret Vow is a solid alternative. It offers damage boost and extra damage at low HP, fitting Mydei’s playstyle. It’s best used after stacking high layers.

At Refinement 5, it provides a 40% damage boost, with an additional 40% against enemies with higher HP, further boosting damage.

 

Recommended Relic & Ornaments

1. Relic Sets

Longevous Disciple

2-Pc: Increases Max HP by 12%.

4-Pc: When the wearer is hit or has their HP consumed by an ally or themselves, their CRIT Rate increases by 8% for 2 turn(s) and up to 2 stacks.

This set gives Max HP bonuses and considerable 16% CRIT Rate, it is an amazing option for Mydei.

Scholar Lost in Erudition

2-Pc: Increases CRIT Rate by 8%.

4-Pc: Increases DMG dealt by Skill and Ultimate by 20%. After using Ultimate, additionally increases the DMG dealt by the next Skill by 25%.

This is another option you can definitely use since Mydei deals damage through his Ultimate and Skill.

2. Planar Ornaments

Bone Collection's Serene Demesne

2-Pc: Increases the wearer's Max HP by 12%. When the wearer's Max HP is 5000 or higher, increases the wearer's and their memosprite's CRIT DMG by 28%.

This new set is literally made for him, it is his best in slot for sure.

Rutilant Arena

2P: Increases the wearer's CRIT Rate by 8%. When the wearer's current CRIT Rate reaches 70% or higher, DMG dealt by Basic ATK and Skill increases by 20%.

This set is the second best in slot, which can increase Mydei's Skill DMG, though it might be a little difficult for Mydei to reach that requirement.

Fleet of the Ageless

2-Pc: Increases the wearer's Max HP by 12%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8%.

3. Main Stats

Body: HP% / CRIT Damage

Shoes: HP% / SPD

Planar Sphere: Imaginary Damage / HP%

Link Chain: HP%

4. Sub Stats

HP% > CRIT Damage > CRIT Rate > SPD > Flat HP

 

Recommended Eidolons

E1 (Key)

The DMG multiplier applied by "Godslayer Be God" to the primary target increases by 30%. And "Godslayer Be God" becomes an Imaginary DMG dealt to all enemies equal to the DMG multiplier applied to the primary target.

E1 increases the damage multiplier of "Godslayer Be God" against the main target and changes its attack mode from Swirl DMG to AoE, significantly expanding its hit area. In group combat, it greatly enhances Mydei’s damage, broadening his applicability.

If possible, E1 is highly recommended, as it greatly boosts Medea’s overall damage output.

E2 (Core)

It ignores 15%of enemy target's DEF during Vendetta state. Each time he heals, 40% of that healing will be converted into the charge of Mydei's Max HP.

E2 adds a defense reduction multiplier to damage dealt in "Vendetta" state and converts healing received into Talent charge, significantly improving charge efficiency. This accelerates the "Godslayer Be God" cooldown and boosts E1 damage.

If you’ve unlocked E1 and have more resources, it’s highly recommended to get E2, greatly enhancing Mydei’s damage output.

E4

When Vendetta state is active, he gets an extra 30% CRIT Rate and additionally restores 10% of his Max HP after getting hit. 

E4 greatly boosts Crit Damage in "Vendetta" state and restores HP based on Max HP when hit. It effectively reduces healing pressure in high-stress situations while significantly enhancing Mydei’s single-target damage.

E6 (Key)

When he enters battle, he will immediately enter the Vendetta state without you needing to charge anything. And the charge required for the "Godslayer Be God" will be lowered to 100 points out of 150.

E6 allows Mydei to enter "Vendetta" state immediately upon entering combat, and lowers the activation threshold for "Godslayer Be God". Combined with E1 and E2, it further increases the coverage and damage of "Godslayer Be God".

Unlocking E6 means reaching Mydei’s peak form, pushing his damage output to the limit.

Eidolons Synergy Tips

Recommended Pull Order: E0+0 → E1+0 → E2+0 / E1+1 → E6+1.

Mydei’s signature light cone offers high stats and complements his HP-drain and healing bonus, but its priority is lower than E1. Mydei relies on his mechanics for damage, making the light cone a nice bonus, not a necessity.

After E1, choose between E2 and the signature light cone. E2 boosts "Godslayer Be God" frequency and provides healing and charge. The light cone improves survivability and charge speed, enhancing skill coverage.

With E6+1, Mydei becomes a high-damage powerhouse. Enjoy the thrill of battle!

 

Mydei's Team

1. Premium Team

In this team, Sunday supports Mydei with action speed, damage bonus, % charge, and crit damage. Tribbie boosts resistance penetration, damage taken, and true damage, enhancing output. Luocha as a healer, ensuring team survivability and restoring Mydei’s HP from skill use and damage.

Main DPS: Mydei

Support / Sub-DPS: Tribbie

• Tribbie increases RES penetration, deals substantial damage herself, and scales with the team's HP. She is the perfect support for The Herta and she is Mydei's best support at least right now.

Support: Sunday / Sparkle / Robin / Bronya

• Sunday and Sparkle provide substantial buffs to CRIT DMG and can advance Mydei's turn order, enabling him to act more frequently and deal increased damage. Bronya helps Mydei dispel debuffs from allies and grants them immediate action, along with a damage boost.
• Robin is undoubtedly the best support in HSR right now, she can fit in every team because of her general buffs. But she won't be the best in slot for this team, Sunday and Sparkle would be better.
• While Bronya is a valuable support, Sunday and Sparkle generally provide more significant enhancements to Mydei's performance. If Sunday or Sparkle are unavailable, Bronya on E2 remains a strong alternative.

Healer: Luocha / Lingsha / Huohuo

• Luocha gives massive heals which Mydei needs. Luocha might be the best healer for that in HSR, as his healing multipliers are amazing. His emergency healing also comes in handy.
• Lingsha deals personal damage, has an emergency heal, and can also heal all allies, which is good for Mydei.
• Huohuo charges Mydei's ultimate up faster which gives him the max skill faster as well. She has good heals but she falls behind Lingsha and Luocha because of not having an Emergency Heal for Mydei.

※ It's worth mentioning that Huohuo will also rerun alongside Mydei in version 3.1.

 

2. F2P Team

In this team, Trailblazer - Remembrance supports Mydei with true damage, crit damage, crit rate, and action speed. Pela reduces enemy defense, boosting Mydei’s damage. Gallagher heals by applying debuffs, ensuring survivability and restoring Mydei’s HP from skill use and damage.

Main DPS: Mydei

Support: Trailblazer - Remembrance & Pela

• As a free-to-play character, the Trailblazer - Remembrance can provide auxiliary support comparable to limited 5-star characters. Trailblazer would be the best F2P alternative if you don't have Sunday.
• Pela is a versatile support character. She provides vulnerability, penetration, and defense reduction bonuses, and can apply debuffs to enemies.

Healer: Gallagher

• Gallagher's healing is limited, but his ability to attack swiftly and generate energy allows Mydei to heal himself based on his own attacks. This synergy can be advantageous, though it may not match the direct healing provided by other healers.

 

Final Thoughts

In summary, Mydei, as the Imaginary main DPS with the Destruction Path, scales heavily off HP like Blade. Mydei has the potential to reach over 10,000 HP which allows him to act as an HP tank and he might potentially lead the new HP meta.

With healers like Luocha or Lingsha, Mydei's HP swings become a non-issue, enabling endless Vendetta uptime. His E1 transforms him into an AoE god, while E6 removes all setup, letting him nuke on demand.

If you love explosive, screen-clearing damage, and high-stakes gaming, Mydei is your must-have.

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