Castle Rush is a mode where each castle boss comes with unique resistances, debuffs, and mechanics. To achieve the highest score, you need to bring the right immunity heroes, damage buffers, debuff removers, and DPS units. Below you’ll find a Seven Knights Rebirth Castle Rush Guide of every castle, complete with their mechanics, the best recommended lineups, and important strategy notes to help you perform at your peak.
Also Read: 7K Rebirth Team Guide – Best team Comp, Dungons
Seven Knights Rebirth Castle Rush Complete Guide – Best Teams
Guardian’s Castle
Guardian’s Castle reduces physical damage, lowers the chance of taking debuffs, and punishes AoE-heavy attacks. The boss also shields itself with Ruby Link and Barrier Buff, and damaging this barrier won’t earn you points, so buff removal is absolutely essential here.
Top Lineup:
- Stun Immunity: Seo-a
- Damage Buffers / Support: Ace, Miho, Lina
- Buff Removal: Noho, Niah
- DPS: Rachael
Alternate Lineup:
- Stun Immunity: Seo-a
- Damage Buffers / Support: Ace, Miho
- Buff Removal: Ariel, Noho
- DPS: Rachael
Buff removal is vital because Ruby Link and Barrier Buff completely block your damage. Heroes like Noho, Niah, and Seo-a can strip two buffs at once, making them especially strong. Teams without strong removers will waste most of their damage.
Fodina Castle
Fodina Castle constantly applies shock and protects itself with a total damage immunity barrier. Buff removal is useless here, since the immunity can only be reduced through debuff duration effects.
Top Lineup:
- Shock Immunity: Chloe
- Damage Buffers / Support: Miho, Lina, Biscuit
- Defense Down: Vanessa
- DPS: Rachael
Alternate Lineup:
- Shock Immunity: Chloe
- Damage Buffers: Miho, Lina, Biscuit
- Buff Duration Reduction: Siria
- DPS: Rachael
The boss’s immunity barrier can only be bypassed by shortening its duration, making Siria one of the most important picks here. Rook buffs also help maximize your damage during the short vulnerability window. Buff removal does not work in this fight.
Immortal Castle
Immortal Castle applies extremely punishing attack reduction and defense reduction debuffs, so debuff immunity and cleansing are crucial. Without them, your damage is crippled.
Top Lineup:
- Burn Immunity: Ace
- Damage Buffers / Support: Miho, Lina, Biscuit
- Defense Down: Vanessa
- DPS: Rachael
Alternate Lineup:
- Debuff Removal: Lucy
- Damage Buffers / Support: Miho, Lina
- Defense Down: Vanessa
- Support: Evan
- DPS: Rachael
Extra Option:
- Debuff Removal: Chloe
The key here is surviving Rachel’s heavy debuffs. If you don’t bring debuff immunity and removal, your stats collapse, making even well-buffed DPS ineffective. Lucy, Evan, and Chloe are excellent stabilizers.
Death Castle
Death Castle disables your heroes with silence, forcing you to bring silence immunity. It also punishes raw AoE spam, so carefully balancing buffs with survivability is important.
Top Lineup:
- Silence Immunity: Cleo
- Damage Buffers / Support: Miho, Lina, Biscuit
- Defense Down: Vanessa
- DPS: Rachael
Alternate Lineup:
- Silence Immunity: Cleo
- Tank: Theo
- Support: Evan
- Damage Buffer: Biscuit
- DPS: Eden
Extra Option:
- Additional picks like Dylan for damage
Using a taunt tank such as Theo allows him to soak single-target skills, while Dylan benefits from full damage notification stacks. This makes him one of the best single-target DPS options for Death Castle.
Ancient Dragon’s Castle
This dragon boss is dangerous because of its burn effects and devastating counterattacks. Burn immunity is essential to survive the ticking damage, and blind is needed to reduce the lethality of its 100% crit-rate counters.
Top Lineup:
- Stun Immunity: Seo-a
- Burn Immunity: Ace
- Damage Buffers: Miho, Lina, Biscuit
- Defense Down: Vanessa
- DPS: Rachael
Alternate Lineup:
- Burn Immunity: Ace
- Damage Buffers: Miho, Lina, Biscuit
- Defense Down: Vanessa
- DPS: Rachael
Extra Lineup Option:
- Burn Immunity: Ace
- Blind: May
- Defense Down: Vanessa
- DPS: Eden
Blind is not optional in longer runs because it prevents your team from being wiped out by the dragon’s counterattacks. With burn immunity and blind covered, you can safely stack buffs and let your DPS unload damage.
Blizzard Castle
Blizzard Castle focuses on freezing your units, making freeze immunity the first priority. The boss also applies dangerous buffs to itself, which must be removed quickly before it overwhelms your team.
Top Lineup:
- Freeze Immunity: Lina
- Damage Buffers / Support: Miho, Rachael, Biscuit
- Defense Down: Vanessa
- DPS: Rachael
Alternate Lineup:
- Freeze Immunity: Lina
- Buff Removal: Noho, Niah
- Damage Buffer: Biscuit
- DPS: Eden
Extra Lineup:
- Freeze Immunity: Lina
- Buff Removal: Niah
- Support: Miho
- Damage Buffer: Biscuit
- DPS: Dylan
Buff removal is key here because the boss gains spike buffs with high crit rate and damage multipliers. Noho and Niah shine since they can strip multiple buffs at once. Time your removals carefully to avoid the boss reapplying buffs immediately.
Each castle in Castle Rush is designed as a puzzle, requiring the right immunity and buff control to open damage windows. Guardian’s Castle and Blizzard Castle emphasize buff removal, Fodina Castle demands debuff duration reduction, Immortal Castle punishes you without debuff cleansing, Death Castle revolves around silence control, and Ancient Dragon’s Castle requires both burn immunity and blind to survive.
The most consistent heroes across multiple castles are supports like Biscuit and Miho for their universal buffs, while Rachael remains the cornerstone DPS for most setups. To succeed in Castle Rush, focus on building a diverse roster of immunity providers, strong buffers, and flexible DPS that can adapt to each unique challenge.