Everlasting Moonglow
Passive: Byakuya Kougetsu
Base ATK 608 · Substat HP 49.6%Lv90 R1
Weapon Event BannerShould You Pull?
Signature-tier on Barbara / Kokomi — Byakuya Kougetsu is the kit hook those builds lean on. Pull on the weapon banner only if you main Barbara / Kokomi and want their ceiling now.
Stats
Base ATK
608
Secondary
HP 49.6%
Weapon Passive
Byakuya Kougetsu
Healing Bonus increased by 10%, Normal Attack DMG is increased by 1% of the Max HP of the character equipping this weapon. For 12s after using an Elemental Burst, Normal Attacks that hit opponents will restore 0.6 Energy. Energy can be restored this way once every 0.1s.
Limited 5★ — R1 already unlocks the kit. R5 is a large passive jump but an expensive vertical investment; only refine if this is a signature you play every abyss.
Best Characters
Recommended
Healer
Best 5★. HP% substat and Normal Attack DMG bonus + healing via Normal Attacks. Top-tier healer weapon.
Recommended
Healer
Kokomi's signature 5★. Healing Bonus substat and passive HP-to-Normal ATK conversion make her Burst window DPS competitive. Best in slot for a Kokomi that wants damage too.
Healer
Sample Teams
From characters who rank this weapon in their top two options.
Vaporize Support
Barbara #1
Barbara as a Hydro enabler in a Vaporize team. Her Melody Loop applies Hydro to the active character and nearby enemies, enabling Pyro DPS to trigger Vaporize. Thrilling Tales ATK buff on swap adds further value.
View teamBloom Support
Barbara #1
Barbara as a Hydro source for Bloom teams. Pairs with Nahida for Dendro/Hydro Bloom seed creation. Not competitive with Nilou or Kokomi in this role, but works in a pinch.
View teamFreeze Core
Kokomi #1
Kokomi provides consistent on-field Hydro application to keep enemies frozen with Ayaka's Cryo. Her healing solves survivability completely, freeing other slots for pure damage supports. A textbook Freeze team.
View teamBloom Team
Kokomi #1
Kokomi triggers Bloom reactions with her Hydro application, generating Dendro Cores from enemies afflicted with Dendro. She can hold Flower of Paradise Lost for Bloom DMG buffs or Sacrificial Fragments for EM. The team is both safe and powerful.
View teamTaser Team
Kokomi #1
Kokomi's Hydro application combined with Fischl's Oz enables continuous Electro-Charged (Taser) reactions. High damage with excellent healing safety. A strong F2P-friendly team.
View teamCompare Similar Catalysts
| Weapon | Base ATK | Secondary | Rarity |
|---|---|---|---|
| 608 | HP 49.6% | 5★ |
 | 608 | HP 49.6% | 5★ |
 | 510 | HP 41.3% | 4★ |
 | 510 | HP 41.3% | 4★ |
 | 401 | HP 35.2% | 4★ |
 | 608 | CRIT DMG 66.2% | 5★ |