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Valencia

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Cerydra is one of the most impactful new Harmony units in Honkai: Star Rail, especially for teams built around Skill-based damage dealers. Her kit is crafted to amplify Skill DMG, ramp up ATK%, and accelerate rotations for allies who rely heavily on active ability uptime—making her an excellent partner for DPS characters like Archer, Dr. Ratio-like units, or any Skill-centric carry.

This guide breaks down the best Light Cones, optimal relic builds, top Planar Ornaments, and her strongest Eidolons, giving you everything needed to maximize Cerydra’s value in any team composition.

Cerydra Build Overview

Cerydra excels as a Skill DMG buffer, enhancing a designated target’s damage while increasing ATK%, CRIT DMG, and Energy regeneration. Because her buffs scale with her own ATK% and SPD, her build focuses on maximizing both.

Core Stat Priorities

• SPD – Ensures she acts before the DPS to apply buffs

• ATK% – Directly increases buff potency

• Energy Regeneration Rate – Enables frequent Ultimates

• Effect RES (optional) – Helps avoid debuffs that delay her rotation

Best Main Stats

• Body: ATK%

• Feet: SPD

• Planar Sphere: ATK%

• Link Rope: Energy Regeneration Rate

Best Substats

1. SPD

2. ATK%

3. Energy Regeneration

4. Break Effect (optional, minor benefit)

Best Light Cones for Cerydra

Cerydra benefits most from Harmony Light Cones that amplify her buffing potential, accelerate her rotation, or directly increase her ATK.

1. Epoch Etched in Golden Blood (Best-in-Slot)

This Light Cone is tailor-made for Cerydra. It offers:

• A massive ATK boost (amplifying her buff scaling)

• Additional buffs to an ally’s Skill DMG

• Synergy with Cerydra’s “Military Merit” granting huge damage bonuses

This is her absolute best Light Cone, offering unmatched synergy and the largest overall buff multiplier for Skill-dependent DPS units.

2. Flowing Nightglow (Top 5★ Alternative)

Flowing Nightglow is an excellent universal Harmony option that stacks Cantillation as allies attack, giving:

• Increased Energy Regeneration Rate

• Team-wide ATK% and DMG% buffs

Cerydra can stack this Light Cone very quickly in Skill-heavy teams, making it a reliable and powerful alternative to her signature.

3. The Forever Victual (Best F2P Option)

A standout 4★ option that works extremely well on her:

• Grants a massive ATK% boost

• Enhances the scaling of her buffs

• Perfect for players without premium Light Cones

This simple but potent ATK-based Light Cone matches Cerydra’s design flawlessly.

4. Carve the Moon, Weave the Clouds (Battle Pass Option)

Perfect buff variety for general use:

• Randomly boosts ATK%, CRIT DMG, or Energy Regen Rate

• Buffs the whole team

• High uptime due to passive cycling

While the randomness isn’t ideal, the strong buff values make it a great choice for broad content.

Best Relic Sets for Cerydra

Cerydra benefits most from relic sets that increase SPD, buff potency, and give additional advantages through her Ultimate rotation.

Sacerdos’ Relived Ordeal (4-Piece Best Set)

This is Cerydra’s strongest relic set.

Benefits:

• +6% SPD, helping her act before allies

• Dramatically enhances the CRIT DMG buff she provides

• Aligns perfectly with her ally-focused skills

It’s the ideal set for maximizing her supportive power.

Eagle of Twilight Line (Good Alternative)

This wind-themed relic set offers:

• Extra Wind DMG (not a priority)

• 25% action advance after using Ultimate

Cerydra benefits immensely from turn manipulation, and this set ensures she can rotate Skills and Ultimates much faster.

Use this if you’re lacking the Sacerdos pieces or want faster cycling.

Best Planar Ornaments for Cerydra

Lushaka, the Sunken Seas (Best-in-Slot)

This set is extremely synergistic because it:

• Increases Energy Regeneration Rate

• Boosts the target ally’s ATK by 12% if they are first in turn order

This reward structure encourages a high-SPD DPS paired with Cerydra, creating ideal burst conditions.

Penacony, Land of the Dreams (Alternative for Wind Teams)

A niche but potent option:

• Increases Energy Regeneration Rate

• Boosts DMG for units sharing the same element (Wind)

Use it if your team is Wind-heavy—otherwise, Lushaka is superior.

Cerydra Eidolons – Which Are Worth Pulling?

S1 – Seize the Crowns of All (High Priority)

• Provides DEF ignore to the buffed ally

• Enhances Skill DMG when “Peerage” is active

• Grants energy when using Skill

This is a major damage amplifier and one of her best Eidolons.

S2 – Forge the Dreams of Many (High Value)

• “Military Merit” gives +40% DMG

• Cerydra gains +160% DMG when an ally has Military Merit

S2 drastically boosts team output, especially in Skill-heavy rotations.

S4 – Remake the Realms of Men (High Value)

• Increases Ultimate DMG multiplier significantly

More Ultimate damage means stronger buffs and smoother team momentum.

S6 – A Journey Set Starward (High Priority)

• Buffed ally gains +20% All-Type RES PEN

• Additional “Merit” damage multiplier

• Cerydra gains +20% All-Type RES PEN when ally is buffed

This Eidolon is a huge late-game damage amplifier and one of the strongest full-kit finishers.

Get The Best Build

If you’re working toward a perfect Cerydra build, farming relics, pushing Memory of Chaos, or preparing for late-game Simulated Universe runs, GladiatorBoost’s Honkai Star Rail boosting services can help streamline your progress. Our expert boosters assist with relic farming, leveling, gear optimization, and tough endgame clears so you can enjoy a fully optimized account and unleash Cerydra’s full support potential. Explore our HSR boosting options whenever you need efficient, reliable progression support.

Final Cerydra Build Summary

• Best Light Cone: Epoch Etched in Golden Blood

• Best Relics: 4-pc Sacerdos’ Relived Ordeal

• Best Planar: Lushaka, the Sunken Seas

• Best Stats: SPD → ATK% → Energy Regeneration

• Top Eidolons: S1, S2, S6

With the right setup, Cerydra becomes one of the strongest Harmony buffers for Skill-dependent DPS units—amplifying their damage, accelerating their rotations, and enabling devastating burst turns.