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Castorice Honkai: Star Rail fighter artwork
Honkai: Star Rail Move & Ability Guide

Castorice moves, skills and special abilities

Move & Ability Guide

Castorice: 5-Star, Quantum, The Remembrance. Faction: Amphoreus (Location).

26 ability entries1 Skill1 Ultimate10 Stat Trace3 Bonus Trace1 Technique1 Talent1 Basic Atk1 Memosprite Talent1 Memosprite Skill6 Eidolon

Skills

1
Silence, Wraithfly's Caress
Skill

Consumes 30% of all allies' current HP. Inflicts Quantum damage equal to 25% of Castorice's maximum HP to one designated enemy and Quantum damage equal to 15% of Castorice's maximum HP to adjacent targets. If the current HP is insufficient, reduces the current HP down to 1. If Netherwing is on the battlefield, the Skill becomes "Boneclaw, Doomdrake's Embrace" instead. Boneclaw, Doomdrake's Embrace Consumes 40% of the current HP of all allies (except Netherwing). Castorice and Netherwing launch Joint ATK on the targets, dealing Quantum damage equal to 15% and 25% of Castorice's maximum HP to all enemies.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Ultimates

1
Doomshriek, Dawn's Chime
Ultimate

Summons the memosprite Netherwing and advances its action by 100%. At the same time, deploys the Territory "Lost Netherland," which decreases all enemies' All-Type RES by 10% . If Castorice has the damage Boost effect from her Talent, then this effect spreads to Netherwing. Netherwing has an initial SPD of 165 and a set maximum HP equal to 100% of max "Newbud." After Netherwing experiences 3 turns or when its HP is 0, it disappears and dispels the Territory "Lost Netherland."

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Stat Trace

10
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 4%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Quantum
Stat Trace

Quantum damage increases by 4.8%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 2.7%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 5.3%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Quantum
Stat Trace

Quantum damage increases by 3.2%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT DMG Boost
Stat Trace

CRIT damage increases by 8%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
DMG Boost: Quantum
Stat Trace

Quantum damage increases by 6.4%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 5.3%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT DMG Boost
Stat Trace

CRIT damage increases by 5.3%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
CRIT Rate Boost
Stat Trace

CRIT Rate increases by 4%

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Bonus Trace

3
Inverted Torch
Bonus Trace

When Castorice's current HP is higher than or equal to 50% of her maximum HP, her SPD increases by 40%. When Netherwing uses "Breath Scorches the Shadow" and inflicts fatal damage to all enemies on the field or brings them to a point where their HP cannot be reduced further, Netherwing's SPD increases by 100%, lasting for 1 turn.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Where The West Wind Dwells
Bonus Trace

Each time Netherwing uses "Breath Scorches the Shadow," the damage dealt increases by 30%. This effect stacks up to 6 time(s) and lasts until the end of this turn.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Contained Dark Tide
Bonus Trace

After ally targets (excluding Netherwing) receive healing, converts 100% of the healed amount into "Newbud." If Netherwing is on the field, this is converted to Netherwing's HP instead. Each ally target can accumulate a conversion amount up to 12% of the max "Newbud". After any unit takes action, all units reset their accumulated conversion amount.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Technique

1
Wail, Death's Herald
Technique

After using Technique, enters the "Netherveil" state that lasts for 20 seconds. While "Netherveil" is active, enemies are unable to actively approach Castorice. During "Netherveil," active attacks will cause all enemies within range to enter combat. At the same time, summons the memosprite Netherwing, advances its action by 100%, and deploys the Territory "Lost Netherland." Netherwing has its current HP equal to 50% of max "Newbud." After entering battle, consumes 40% of the current HP of all allies (except Netherwing).

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Talent

1
Desolation Across Palms
Talent

The maximum limit of "Newbud" is related to the levels of all characters on the battlefield. For every 1 point of HP lost by all allies, Castorice gains 1 point of "Newbud." When "Newbud" reaches its maximum limit, can activate the Ultimate. When allies lose HP, Castorice's and Netherwing's damage dealt increases by 10% . This effect can stack up to 3 time(s), lasting for 3 turn(s). When Netherwing is on the field, "Newbud" cannot be gained through Talent, and HP lost by all allies (except Netherwing) will be converted to an equal amount of HP for Netherwing.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Basic Atk

1
Lament, Nethersea's Ripple
Basic ATK

Inflicts Quantum damage equal to 25% of Castorice's maximum HP to one designated enemy.

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Memosprite Talent

1
Mooncocoon Shrouds the Form
Memosprite Talent

When Netherwing is on the field, it acts as backup for allies. When allies take damage or consume HP, their current HP can be reduced down to a minimum of 1, after which Netherwing will consume HP at 500% of the original value until Netherwing disappears. Wings Sweep the Ruins Consumes all HP and inflicts 6 instance(s) of damage, with each instance dealing Quantum damage equal to 20% of Castorice's maximum HP to one random enemy. At the same time, recovers HP by an amount equal to 3% of Castorice's maximum HP plus 400 for all allies Roar Rumbles the Realm

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Memosprite Skill

1
Claw Splits the Veil
Memosprite Skill

Inflicts Quantum damage equal to 20% of Castorice's maximum HP to all enemies. Breath Scorches the Shadow Launching "Breath Scorches the Shadow" will consume 25% of Netherwing's maximum HP to deal Quantum damage equal to 12% of Castorice's maximum HP to all enemies. In one attack, "Breath Scorches the Shadow" can be launched repeatedly, with the damage multiplier increased progressively to 14% / 17% . After reaching 17% , it will not increase further. The damage Multiplier Boost effect will not decrease before Netherwing disappears. When Netherwing's current HP is equal to or less than 25% of its maximum HP, launching this ability will actively reduce HP down to 1, and then trigger the ability effect equal to that of the Talent "Wings Sweep the Ruins."

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.

Eidolon

6
Snowbound Maiden, Memory to Tomb
Eidolon

When the enemy target's current HP is 80%/50% of maximum HP or lower, the damage dealt to it by "Boneclaw, Doomdrake's Embrace," "Claw Splits the Veil," "Breath Scorches the Shadow," and "Wings Sweep the Ruins" is 120%/140% of the original damage respectively.

Requirements / unlock: Eidolon 1

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Crown on Wings of Bloom
Eidolon

After summoning the memosprite Netherwing, Castorice gains 2 stack(s) of "Ardent Will." "Ardent Will" can stack up to 2 time(s) and can be used to offset the HP cost of Netherwing's Memosprite Skill, "Breath Scorches the Shadow" and advance Castorice's action by 100%. When using the next Enhanced Skill, Castorice gains "Newbud" by an amount equal to30% of max "Newbud."

Requirements / unlock: Eidolon 2

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Pious Pilgrim, Dance in Doom
Eidolon

Ultimate Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10. Memosprite Talent Lv. +1, up to a maximum of Lv. 10.

Requirements / unlock: Eidolon 3

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Rest in Songs of Gloom
Eidolon

While Castorice is on the field, all allies' Incoming Healing during HP restoration increases by 20%.

Requirements / unlock: Eidolon 4

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Pristine Pages, Prophecy as Plume
Eidolon

Skill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15. Memosprite Skill Lv. +1, up to a maximum of Lv. 10.

Requirements / unlock: Eidolon 5

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.
Await for Years to Loom
Eidolon

When Castorice or Netherwing inflicts damage, increases Quantum RES PEN by 20%. During Netherwing's attacks, can reduce enemy Toughness regardless of Weakness Types. When breaking Weaknesses, triggers the Quantum Weakness Break effect. And the number of Bounces for Netherwing's Talent "Wings Sweep the Ruins" additionally increases by 3.

Requirements / unlock: Eidolon 6

Source details & verification
HoYoWiki mechanics reference (community-editable), reviewed October 29, 2026. This is a concise mechanics index; the source contains full conditions and level-dependent scaling. Not independently tested in-game.