Ascension Material

★★★★

Sea Siren's Torn Fin

Sea Siren's Torn Fin is a 4★ material in Honkai: Star Rail. See how to get it and which characters/light cones need it below.

4★Ascension Material

2Used to upgrade

2How to obtain

Sea Siren's Torn Fin is a material ★4 in Honkai: Star Rail. 2 characters need this item to level up. Obtainable from 2 different sources in-game.

Last updated: 30/07/2026

The figures on this page come directly from gamevika's internal game data store (counted/read straight from the real records), not an estimate or copy from elsewhere.

Description

Lady of Crashing Waves's spiny tail fin. Can be used for the Ascension of Ice characters.

Lore

The daughters of the sea once had plump, long tails that glowed in the night, guiding lost fishermen home like lighthouses. Now, those fins have turned to bone spikes, piercing through the very chests they once protected. "The mad waves of the Skiana Sea can reach a thousand meters high. The ocean is no gentle mother."

Farm it smart

A BOSS material. The biggest pain: weekly bosses cap rewards per week, so this is often the BOTTLENECK that traps a character at the 70→80 ascension. Only fight the boss dropping mats for the character you are ACTUALLY building — do not spread thin.

Material Planner →

How to obtain

Stagnant Shadow: "Warbling Shores" Styxia
Omni-Synthesizer — Material Exchange

Used to upgrade

2 characters / light cones need this material

×65

Evernight

×65

Cyrene

Stats

Rarity	★★★★
Type	Ascension Material
Stack limit	99,999

Official names in every language

Tiếng Việt	Vây Khuyết Siren
English	Sea Siren's Torn Fin
日本語	セイレーンのひれ
한국어	세이렌의 지느러미 잔해
繁體中文	海妖殘鰭
简体中文	海妖残鳍

Where to use it / Related tools

Material Planner →

Sea Siren's Torn Fin is an upgrade material — check the Material Planner to see how much you need for the character you're building.

Same-type items

Enigmatic Ectostella Broken Teeth of Iron Wolf Endotherm Chitin Horn of Snow Lightning Crown of the Past Shadow Storm Eye Void Cast Iron Golden Crown of the Past Shadow Netherworld Token Searing Steel Blade Gelid Chitin Shape Shifter's Lightning Staff Ascendant Debris Nail of the Ape Suppressing Edict IPC Work Permit Raging Heart Dream Fridge Nail of the Beast Coffin A Glass of the Besotted Era Dream Flamer Chordal Mirage Invasive Clot Radiant Prominence Thunder Strum Charred Bud of Twilight Darkveil Moonlight Harbinger of Strife Sneering Harlequin

← All items Material Planner →

FAQ

What is Sea Siren's Torn Fin?

Lady of Crashing Waves's spiny tail fin. Can be used for the Ascension of Ice characters.

Where do you get Sea Siren's Torn Fin?

Sources for Sea Siren's Torn Fin: Stagnant Shadow: "Warbling Shores" Styxia · Omni-Synthesizer — Material Exchange. See the “How to obtain” section above for details on each source.

What type of item is Sea Siren's Torn Fin?

Sea Siren's Torn Fin is a 4★ material in Honkai: Star Rail, in the “Ascension Material” category.

What is Sea Siren's Torn Fin used for?

Sea Siren's Torn Fin is used by 2 characters.

Understand the mechanics behind this 4

Trailblaze Power guide: best ways to spend it, Fuel, Jade refreshes, and your daily farming route→ Efficient Material Farming in Honkai: Star Rail: Calyx, Stagnant Shadow, Echo of War, and a Weekly Route→ Assignments Guide: Who to Send Where for Max Passive Materials and Credits→ How to Farm Credits in Honkai: Star Rail (Never Go Broke Leveling Traces & Relics)→