Immortal Castle Guide

This is a Castle Rush guide for Immortal Castle in Seven Knights Re:Birth. Covering Rachel's Immortal Castle Best Team, Best Heroes, Strategy, Tips, and How to Get the Highest Scores.

Immortal Castle Overview

Immortal Castle is one of Castle Rush's stages where you face the Seven Knights and earn points. It opens every Wednesday, and rewards are distributed daily at 5 PM (PST) based on Guild Rank, which is determined by the total points earned by all members.

Tips!	Guild members who don't participate will not receive rewards.

Enemy Info

Round 1
Rook	Chancellor	Rook
Round 2
Rook	Chancellor	Rook
Round 3
Rook	Rachel	Chancellor

Rachel in Immortal Castle inflicts Burn, All Attack Reduction, and Defense Reduction, making extended battles highly demanding. Meanwhile, Immortal Castle Rook and Chancellor can also inflict Burn and possess Physical Damage Resistance, making this stage difficult to clear without the right team setup.

Immortal Castle Best Heroes

Burn Immunity

Yui	Yui is also the top recommended support for most stages. She provides continuous healing, greatly boosting team survivability. Enhancing her healing skill for an extra turn is highly recommended. Recommended Set: Paladin/Gatekeeper
Ariel	Ariel also grants a Magic Boost to all allies and inflicts Defense Reduction on enemies. Additionally, she can inflict Blind, reducing the enemies' chances of landing attacks. Recommended Set: Assassin

Healing & Debuff Removal

Lina	Lina provides a Damage Boost and Continuous Healing. With Effect Resist Boost, it decreases the chance of being inflicted with Stun. Lina doesn't require any Skill Enhancement. Recommended Set: Paladin/Gatekeeper
Lucy	Lucy has a skill that heals all allies and removes 2 debuffs. However, since her healing scales with Defense, the healing output may be lower. Recommended Set: Gatekeeper
Chloe	Chloe provides an All Attack Boost, Debuff Removal, and a chance to inflict Unable to Recover. Recommended Set: Gatekeeper

Damage Dealer (DPS)

Miho	Inflicts Magic Vulnerability and Buff Duration Reduction, while granting Life Drain to all allies, making her an ideal pick as DPS. Recommended Set: Assassin
Ruri	A Magic hero with a skill barrage that strikes 3 enemies twice. Thanks to her Magic Damage Boost, her damage steadily increases during combat and spikes further when hitting weaknesses, making her an ideal DPS for this castle. Recommended Set: Assassin
Sera	Recommended F2P DPS for this castle. Sera inflicts Buff Reduction and grants herself a Crit Rate Boost. No Skill Enhancement needed. Recommended Set: Avenger

Sub-DPS & Utility

Yeonhee	Yeonhee is a Magic Damage hero with a Defense-Ignoring Triple-Target Attack. She is an excellent DPS, capable of inflicting Sleep, and provides Magic Attack Boost to all allies while granting All Damage Nullification to herself. Recommended Set: Assassin
Biscuit	Biscuit provides excellent utility with her Defense Debuff, Buff Removal, and Weakness Hit Chance Boost, making her a strong addition to almost any team. Recommended Set: Vanguard/Gatekeeper
Ace	He inflicts Defense Reduction, Physical Vulnerability, Buff Duration Reduction, and Reduced Incoming Healing, creating opportunities for your team to deal higher damage. Recommended Set: Vanguard/Gatekeeper

All the enemies that appear in Rachel's Immortal Castle have Physical Resistance, Single-Target Attack Resistance, and Quintuple-Target Attack Resistance buffs, so using Magic Triple-Target attackers is recommended.

Team Formation Examples

Premium Team 1

Front Row	Front Row	Front Row	Front Row	Back Row
Yui Ariel Burn Immunity	Lina Healer Def Debuffer	Biscuit Buff Removal Def Debuffer (Flex Slot)	Miho Debuffer Sub DPS	Ruri Yeonhee Magic Attack Main DPS

Premium Team 2

Front Row	Front Row	Front Row	Back Row	Back Row
Yui Ariel Burn Immunity	Lina Healer Def Debuffer	Biscuit Buff Removal Def Debuffer (Flex Slot)	Miho Debuffer Sub DPS	Yeonhee Magic Attack Main DPS

F2P Team

Front Row	Front Row	Front Row	Front Row	Back Row
Yui Burn Immunity Healer	Lucy Chloe Debuff Removal	Ace Biscuit Debuffer	Ariel Miho Sub DPS	Sera Magic Attack Main DPS

Immortal Castle Tips & Strategy

Form Teams Effective Against Rachel

The key to victory is bringing heroes with Magic Attacks with 3-Enemy Target skills, Burn Immunity and Debuff Removal to counter Rachel, so adjust your lineup accordingly.

Use Protective Formation

Protective Formation is the recommended setup for Immortal Castle. At Level 20, it boosts Back Row heroes' Attack by 26% and grants Front Row supports and healers a 6.5% Defense increase. Other formations can also work, but require more investment into your characters and gear.

Tips!	Make sure to enhance the formation level for increased back row and front row effect. The higher the Formation level, the better.

Use Skill Queue

Auto Skills offer convenience, but they don't always select the optimal skills in critical situations. It's best to use the Skill Queue to start with a buff, then monitor combat and manually activate skills as needed.

Tips!	Strategically, queue buffs first, such as 'Barrier', then use priority skills manually to gain the upper hand.

Enhance Your Hero

Enhance your heroes' skills, ultimate, and power-up to +5. Prioritizing tanks and healers to boost their effectiveness and utility. Skill & Ultimate Enhancement materials can be obtained from Story Event rewards, the Shop, and the Infinite Tower.

How to Get the Highest Score

Use Magic Heroes with 3-Target Skills

All enemies in Immortal Castle have Physical Resistance, Single-Target Attack Resistance, and Quintuple-Target Attack Resistance buffs. To increase damage output and achieve a high score, use Magic-type heroes with Triple-Target Attack skills.

Sustain is Optional

The core mechanic of Castle Rush is to maximize total damage within the turn limit, as scores are based on the cumulative damage dealt before the final turn. If your team can endure without heavy support, focus on offense and debuff removal instead to maximize score.

Tips!	If your team struggles, bring a healer, debuffer, or crowd control to survive until the final turn.

Related Seven Knights Re: BIRTH Articles

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Best Hero Tier List	Reroll Tier List	Best Pet Tier List

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How To Reroll Fast?	Leveling & Ruby Farming Guide	Daily Things to Do
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Tower of Trials Guide	7K Chess Guide	Equipment Preset Guide
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Error Guide and How to Fix	Burn / Dragonflame Guide	Paralysis Guide
Bleed Guide	Freeze Guide	Stun Guide
Petrify Guide	Shock Guide	Sleep Guide
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Hero Per Specialty

By Grade
Legendary					Rare					Uncommon					Common
By Max Star Rank
6★					5★					4★					3★
Per Type
Attack				Magic				Defense				Support				Universal
By Attack-Type
Physical										Magic