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Seven Knights Idle Adventure

Awakened Siris Endorma - Heir to the Hidden Palace Siris

Heir to the Hidden Palace Siris

Ranged Type

The Swordmaster's Son

Legendary+
November 27, 2025

Unlock reward : 50Rubies icon- Seven Knights Idle Adventure

Hero Heir to the Hidden Palace Siris portrait - Seven Knights Idle Adventure

Skills

Range : 60CD : 0Atk speed : 149

Deals damage equal to 600% of Attack to the target.

Range : 60CD : 0Atk speed : 149

Deals Critical Hit Damage equal to 850% of Attack to the target. Grants the Blood of the Hidden Palace buff to the caster for 2 sec and also grants the Ascent of the Hidden Palace buff to allies for 2 sec upon a successful attack. Also inflicts the Corrosion debuff on the hit target for 2 sec.

Blood of the Hidden Palace

Increases Weakness Attack Rate by 24%. When attacking a target with Frostbite, increases final damage by 30%.

Ascent of the Hidden Palace

Increases Attack Speed by 24%.

Corrosion

Deals damage equal to 20% of Attack every 1 sec.

Range : 120CD : 10Atk speed : 149

Grants the Biting Cold buff to allies for 10 sec, then deals damage equal to 1500% of Attack in a 5m area around the target. Grants the caster the Ice Crystal buff for 10 sec upon a successful attack. Also inflicts the Frostbite debuff on the hit target for 10 sec.

Biting Cold

Increases Critical Hit Rate by 36%.

Ice Crystal

Nullifies damage taken 5 time(s). Increases Bonus Damage Rate by 24%. Increases Vital Strike Chance by 24%.

Frostbite

Decreases Attack Speed by 10% and Movement Speed by 10% Deals damage equal to 10% of Attack every 1 sec.

Stats

Stats at level 1
StatsValueStatsValue
HP456829Attack100950
Defense30594Critical rate31.84%
Hit1121Critical factor150%
Dodge1121Attack speed149
Health regen13052Move speed40
Critical rate resist0%Lethal rate0%
Reduction rate0%Extra damage rate0%
Vital point rate0%Lethal factor150%
Extra damage factor150%Vital point factor130%

A hero from another dimension. Not much is known about this hero.

Heir to the Hidden Palace Siris Guide

Quick Overview
Tier S
Role Support
Best Modes
Boss Farm/Stage Race
Investment Priority High
Verdict
Must pull (Collab)
Strength

Only source of Corrosion debuff in the game

Weakness

Weak AOE damage limits PvP impact

Heir to the Hidden Palace Siris is defined by one unique trait: she is the only hero in the game that applies the Corrosion debuff, making her an indispensable support for Corrosion-dependent teams. Her team-wide Crit Rate buff is also extremely valuable in end-game PvE. While her PvP impact is limited due to weak AOE damage, she can still be used in competitive play if needed.

⚠️ Heir to the Hidden Palace Siris is a collaboration hero — she can only be obtained during her collaboration event. If you missed it, you will have to wait for the collab to return before being able to summon her.

Should You Use Heir to the Hidden Palace Siris?

Yes — only Corrosion applicator in game. Essential for Luna/Jin teams.

Strengths

Only Corrosion applicator in the game — Corrosion is applied on every critical hit attack, meaning she keeps it up constantly throughout the fight. For heroes whose entire kit scales with Corrosion, Siris is a non-negotiable teammate.
+36% Crit Rate for all allies — Biting Cold grants the entire team +36% Critical Hit Rate for 10 sec via her active skill, a strong team-wide buff that benefits any DPS-heavy composition.
Frostbite debuff — her active skill applies Frostbite on the target. This also opens up synergies with heroes that deal bonus damage against Frostbitten targets.
Solid personal survivability — Ice Crystal grants a 5-stack Veil plus, making her surprisingly durable for a support hero.

Weaknesses

Limited PvP impact — her AOE damage is too weak to make a meaningful difference in competitive play. She can be used in PvP but will not carry fights.
Collaboration Hero — Can only be obtained during limited periods.
Heir to the Hidden Palace Siris Corrosion trio team formation with Jin and Luna - Seven Knights Idle Adventure

Corrosion trio team formation with Jin and Luna.

Best Game Modes

Build & Optimization

Focus on Critical Hit Rate to ensure consistent Corrosion application and maximize her team utility.

Investment Advice

Early game
Skip — collab only
Mid game
Essential for Corrosion teams
Late game
Must have for Luna/Jin

FAQ

Is Heir to the Hidden Palace Siris worth pulling?

Yes — the only Corrosion applicator in the game. Essential for any team running White Whale Luna or Solderet's Contractor Jin.

Is the 36% Critical Hit Rate buff rare?

Yes. Only two heroes currently provide it — Siris and awakened Rachel. This buff is extremely important for performing well in end-game PvE content.

Who should I star up between Siris and White Whale Luna?

If both are awakened, prioritize Luna — she is a pure DPS and benefits more from star investment. Even at 1 star, Siris can still fulfill her support, buffer and debuffer role effectively.

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