Seven Knights Re:BIRTH: Castle Rush Rachel Boss Strategy

To survive and maximize guild points against Rachel in the Castle Rush Immortal Castle stage of Seven Knights Re:BIRTH, deploy a 1-4 Defensive Formation with a dedicated single-target burst hero in the solo backline position. Counter her Phoenix skill immediately with cleanse or debuff immunity, clear her escort guards on Wave 3, and withhold major burst cooldowns until after her passive revival triggers.

Recommended Formation and Team Roles

Castle Rush scores cumulative damage across an escalating turn limit. Rachel gains stacking damage buffs as the turn count rises, eventually wiping the squad. Running a 1-4 Defensive Formation protects your primary damage dealer behind four frontline supports while channeling the formation's offensive scaling into that single slot.

Slot / Role	Function	Key Objective
Solo Backline DPS	Single-target burst	Channels the backline attack bonus directly into Rachel.
Cleanse / Immunity Support	Dispel or debuff block	Removes Burn status and offsets attack and defense penalties.
Damage Amplifier	Defense shred and critical damage	Multiplies burst windows before and after Rachel's revive.
Healing Support	Sustain, health recovery, and barriers	Absorbs residual Burn ticks and mitigates single-target Blaze hits.

Distributing incoming hits across four frontline heroes prevents Rachel's single-target Blaze attack from targeting your primary damage dealer early in the encounter.

Wave Progression and Skill Pacing

Castle Rush spreads the fight across three stages. Mismanaging cooldowns on the preliminary waves leaves the team vulnerable to Rachel's opening attacks in Wave 3.

Wave 1: Clear frontline minions using basic attacks or low-cost secondary abilities. Do not activate long-cooldown damage buffs or single-target burst skills, as their durations will expire before reaching the boss.
Wave 2: Eliminate the secondary guards while restoring full health to your frontline. Ensure your cleanse skill is off cooldown before advancing.
Wave 3 Minions: Rachel spawns alongside elite castle guards. Direct initial area-of-effect skills at these side guards immediately. Clearing them ensures your single-target backline carry targets Rachel directly.
Boss Engagement: Apply defense reductions and defensive barriers as soon as the escort minions fall.

Countering Phoenix and Burn Debuffs

Rachel's signature active ability, Phoenix, inflicts heavy fire damage, applies a Burn damage-over-time status effect, and significantly reduces the team's attack and defense attributes. Left unaddressed, the attack reduction halves your damage output, while the defense reduction leaves frontline heroes open to lethal follow-up damage from Blaze.

Reactive Cleansing: Cast your team cleanse immediately following Rachel's Phoenix cast rather than using it preemptively or on basic attack turns.
Proactive Immunity: If using a hero with debuff immunity or barriers, refresh the effect right before transitioning from Wave 2 into Wave 3.
Defense Buffers: Maintain defense buffs to counteract Rachel's defense shred, preventing normal attacks from forcing early emergency heals.

Managing the Phoenix Revival Threshold

Rachel's passive ability resurrects her with full health upon depletion of her first health bar. Triggering this revive removes all active debuffs on Rachel and upgrades her skill damage multipliers.

Conserve High-Cost Burst: Do not use primary damage ultimates or high-multiplier burst skills to finish off the final sliver of Rachel's first life bar. Excess damage does not carry over into her revived state.
Reapply Debuffs Immediately: Once Rachel completes her revival animation, immediately reapply defense shred and damage amplification before firing burst skills.
Execute Phase Priority: Treat the post-revive phase as an aggressive damage race. Prioritize offensive skill queues over low-priority sustain if defensive shields remain active, maximizing points before her turn-timer enrage overwhelms the team.