The snow-clad realm of Eidolia, where death is cherished, now slumbers in sweet repose.
Castorice, the Daughter of the Styx and Golden Scion who seeks the ember of "Death," embarks on her journey. To cradle the lament of souls and embrace the solitude of fate.
—"Life and death are but journeys. When a butterfly alights on a branch, decay shall bloom anew."
As the Quantum-type main DPS introduced in Honkai: Star Rail of the 3.2 Anniversary Update, Castorice pioneers a unique HP-consuming combat system centered on life-to-damage conversion. Her kit revolves around her summon, [Soulsteel Deathwyrm], trading team HP for explosive burst damage while balancing AoE resistance shred and survival management. Empowered by the Path of Remembrance, she dynamically evolves by recording enemy weakness data mid-battle.
Skill Mechanics Explained
Normal Attack: Mourning, Ripples of the Dead Sea
Deals Quantum damage equal to 50% of Castorice's Max HP to a single target. Primarily used for energy regeneration and finishing low-health enemies.
Skill: Silence, Caress of the Mourning Butterfly
Consumes 40% of all allies' current HP (minimum 1 HP retained) to deal 50% of Castorice's Max HP as Quantum damage to the primary target, with 30% of her Max HP as splash damage to adjacent enemies.
Enhanced Effect with [Soulsteel Deathwyrm]:
Transforms into [Boneclasp, Deathwyrm's Embrace], consuming 50% HP to unleash an AoE attack dealing 24% of Castorice's Max HP + 42% of the Deathwyrm's Max HP as Quantum damage.
Ultimate: Throat of the Abyss, Chime of Rebirth
Instantly summons [Soulsteel Deathwyrm] (Speed: 140) and deploys the [Netherrealm of Isolation] field for 3 actions, reducing all enemies' All-Type RES by 20%. If Castorice holds active talent buffs, they extend to the summon. The Deathwyrm has fixed Max HP and exits after 3 actions or HP depletion.
Talent: Echo of Life and Death
Gains 0.6% ATK per 1% HP lost (capped at 70%). With Eidolon 1, overhealing converts to additional ATK. Requires team healers like Huo Huo or Luocha to sustain HP and buff uptime.
Meta Analysis & Team Synergy
Castorice excels in Quantum-weakness stages (e.g., Chaos Memory Floors 9-10) and multi-wave elite battles. Her single-target burst rivals Jing Yuan’s, but AoE potential is limited by summon duration.
Signature Light Cone: Farewell, Sweetened by Beauty
Boosts Max HP by 30% and grants 24% DEF Ignore, significantly enhancing shield-breaking efficiency.
High-Risk, High-Reward Playstyle
Her HP-draining mechanic demands robust healing to counter burst AoE threats. Optimal teams include:
Quantum Core: Fu Xuan (teamwide DMG reduction) + Huo Huo (emergency healing)
Flex Supports: Tingyun (energy battery) or Silver Wolf (DEF shred)
Light Cone Tier List:
Best-in-Slot: Farewell, Sweetened by Beauty
Budget Alternatives: Texture of Memories (survivability) / Good Night and Sleep Well (4-star, debuff synergy)
Investment Guide
Whales: Prioritize E0 + Signature LC (clears Memory of Chaos comfortably). E2 unlocks full potential.
F2P: Pair with Natasha/Pela and Asta for SP-efficient rotations.
Long-Term Value: As the sole Quantum HP-consumption DPS, Castorice thrives in Silver Wolf/Fu Xuan comps but struggles without sustain units.
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