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Castle Rush guide and best heroes to train in Seven Knights Re:birth (7K Rebirth). Covers Castle Rush strategy info and the best heroes to raise.
Table of Contents
What is Castle Rush?
A Guild Activity Where You Compete on Total Score
Castle Rush is a PvE (monster battle) mode you can play from your Guild. Your individual score, based on the damage you deal, is tallied by your Guild every day, and you'll receive rewards based on both your individual score and your Guild Rank.
You'll Face a Different Seven Knight Each Day
| Best | Monday | Tuesday | Wednesday |
| PHY Attack 3-4 Target Attack | Rudy Guardian's Castle | Eileene Fodina Castle | Rachel Immortal Castle |
| Best | Thursday | Friday | Saturday |
| PHY Attack 3-4 Target Attack | Dellons Death Castle | Jave Ancient Dragon's Castle | Spike Blizzard Castle |
| Best | Sunday | ||
| Either Works Single-Target Attack | Kris Hell Castle |
Each Castle Rush stage has 3 waves of enemies, with a Seven Knight boss appearing at the end. The status ailment immunity and attack type required change every day, so plan your hero training to increase the number of castles you can clear.
Training 3-4 Target Attackers Is Key
The key feature is that every boss except Sunday's Kris has Damage Resistance against Physical/Magic Single-Target and 5-Target Attacks. Hitting multiple targets is advantageous, but 5-target attacks won't work, so it's important to train attackers who can hit 3-4 targets.
 Tips! | There's a 70-turn time limit, so damage output matters more than durability. You can check the info for each Castle Rush at any time via the "Guide" option next to "Enter." |
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Ranking Up Increases Your Seven Knights Summon Chance
The main rewards vary by Guild Rank and include Hero Summon Cards, Gold Boxes, and Castle Rush Challenge Medals, and your chance to summon a Seven Knight increases as your rank goes up.
| Tips! | Collect 4,000 Castle Rush Challenge Medals to exchange them for a Seven Knights Summon Card. Also, the Guild with the best results will be shown on the Challenge screen for one week. |
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Milestone Rewards Include Legendary Rings and More
You can earn Milestone Rewards based on the combined total of your highest scores against all 7 bosses from Monday through Sunday. You can earn up to 7 Legendary Accessory Boxes, so aim for a high score and participate actively.
Milestone Rewards for Legendary Accessory Boxes
| 10M | 20M | 35M | 50M |
 4★ | 4★ | 4★ |  5★ |
| 70M | 90M | 150M | |
| 5★ |  6★ |  6★ Select |
Unlocked at Guild Level 5
Castle Rush is not PvP (player-vs-player), but you need to belong to a Guild of Level 5 or higher to participate.
How to Join and Create a Guild, and Its Benefits
Skip Battles with Sweep
Sweep Types and Score Earned
| Sweep | Ruby Cost | Score Earned |
| Paid | 100 | All-Time High Score for That Day |
| Free | 0 | 90% of Last Week's High Score for That Day |
If you have a past record, you can skip battles using the Sweep button next to the Enter button. There are Free and Paid Sweep options — keep in mind that Free Sweep deducts 10% from last week's high score, while Paid Sweep requires 100 Rubies.
| Tips! | There's also a chance to set a new high score, so it's generally best to challenge normally! Only use Sweep when you really don't have the time. |
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Train with Practice Battle
You can run a Practice Battle via the Practice Battle button next to the Sweep button. Since you can only attempt the real thing up to 5 times a day, be sure to use Practice Battle to check and adjust your team, equipment, and skill order.
Best Heroes to Train for Castle Rush
Castle Rush Best Heroes to Train Quick Reference Chart
The best heroes to train for Castle Rush are shown above. Basically, training your SS and S Tier heroes is enough, but if you don't have them, train an A Tier or lower hero as a substitute.
| ▼Status Ailment Immunity | ▼3-4 Target Attack | ▼Single-Target Attack |
| ▼Versatile Supporters | ▼Other Required Heroes |
Status Ailment Immunity Heroes
First, train one hero each who can block the status ailments used in each Castle Rush. Most overlap with the heroes needed for the Power Up Dungeon, but Silence Immunity requires training a separate hero.
Silence Immunity
Silence Immunity is needed for Thursday's Dellons battle. Deo is the best pick thanks to his high support utility — he can generate a Barrier, heal all allies, and boost Crit Damage.
Stun Immunity
Stun Immunity is needed for Monday's Rudy battle and Friday's Jave battle. Evan is ideal for Monday (Magic is best), while Sieg — who can boost damage output — is ideal for Friday (Physical is best).
Shock Immunity
Shock Immunity is needed for Tuesday's Eileene battle. Chloe can deal the most damage, but her skill rotation is harder to execute, so Guan Yu is fine until you get used to it.
Burn Immunity
Burn Immunity is needed for Wednesday's Rachel battle and Friday's Jave battle. Yui, who can also work as a Healer, is fine early on, but using Ryan, who can boost damage output, is ideal.
Freeze Immunity
Freeze Immunity is needed for Saturday's Spike battle. Magic damage doesn't work well against Spike, so training Feng Yan is a better choice than Lania.
Death Immunity
Death Immunity is needed for Sunday's Kris battle. Xiao is the best pick thanks to her Barrier generation, HP healing, and single-target damage boost.
3-4 Target Attackers
In most Castle Rush battles, 3-4 target attacks are effective, while 5-target attacks are reduced by Damage Resistance. Train at least one Physical and one Magic attacker each who can hit 3-4 targets.
Monday-Wednesday: Magic Attacks on 3-4 Targets
Both of Nezha's skills hit 3 targets and deal high damage, making her the best Magic attacker. She can be exchanged for Guild Tokens, so prioritize getting her that way.
How to Join and Create a Guild, and Its BenefitsMonday-Wednesday: Physical Attacks on 3-4 Targets
Taka and Ryan are great picks since both of their skills hit 3 targets and deal high damage. If you don't have them, prioritize training the Rare hero Feng Yan instead.
| Tips! | Keep in mind that Rachel's Skill 1 is a single-target attack until she reaches Transcendence 6. |
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Single-Target Attacker
Only Sunday's Kris battle carries a risk if you attack anything other than the boss, so you'll need a single-target attacker. That said, you can reuse Pascal or Shane, who are also useful in Raids, so the Kris battle is easier to tackle than the other days.
| Tips! | Sieg has two single-target skills and is also useful for damage support and healing. He's also great as a Stun Immunity hero in the Rudy and Jave battles, so he's well worth training if you want to boost your Castle Rush score. |
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Versatile Supporters
Biscuit is an extremely versatile Supporter who performs well in any Castle Rush battle.
Also, Ryan — who can fill the roles of Attacker, Supporter, and Tank all at once — is an excellent hero for Thursday through Saturday (where Physical is effective) and Wednesday (where Burn Immunity is needed).
Other Heroes Needed for Each Castle Rush
Heroes to Ultimately Use — Summary
| Mon/Sat/Sun | Tue/Wed | Thu/Fri |
|---|---|---|
| Biscuit Buff Removal Weakness Hit Chance ↑ | Miho Buff Duration Reduction Debuff Removal | Ryan Taunt × Physical Attack Reduction Blind |
Various gimmick countermeasures are needed from Monday through Sunday, but training these three heroes — Biscuit, Miho, and Ryan — covers every Castle Rush requirement.
Ideally, you'll want to rely on these three heroes in the long run, but use the other heroes listed below until you've obtained and trained them.
Buff Removal
Buff Removal is effective in Monday's Rudy battle and Saturday's Spike battle, and the heroes above stand out for their number of attack targets and high support utility. Ultimately, using Biscuit, who contributes greatly to boosting damage, is ideal.
Buff Duration Reduction
In Tuesday's Eileene battle, Buff Duration Reduction is effective for removing Damage Immunity. Train any one of the 3-4 target attackers listed above. Ultimately, Miho — who can double as a Supporter and Sub-DPS — is the best choice.
Debuff Removal
In Wednesday's Rachel battle, use Debuff Removal to counter Attack/Defense Reduction. Lucy or Chloe, who are also useful in Raids and the Power Up Dungeon, work well early on, while Miho or Orly — who gain Debuff Removal at Transcendence 2 — are the best choice in the long run.
Taunt or Damage Debuff
In Thursday's Dellons battle, to avoid being defeated by his high-damage single-target skill, using Ryan or Li, who have Taunt plus Physical Attack Reduction, is the best choice. Once your team is further developed, you can also survive using Rachel's damage debuff.
| Tips! | It's best to use Ryan once his Skill 1 upgrade adds Physical Attack Reduction, and Rachel once her Skill 1 becomes a 3-target attack at Transcendence 6. |
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Blind or Damage Debuff
In Friday's Jave battle, his Critical attacks hit hard, so using Ryan or May, who can apply Blind to cause him to Miss, is the best choice. As with the Dellons battle, once your team is further developed, you can also survive using Rachel's damage debuff.
| Tips! | Raise Rachel's Weakness Hit Chance, or train her to Transcendence 6 so her Skill 1 becomes a 3-target attack, to make sure her damage debuff lands on Jave. |
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Focus Target or Weakness Hit Chance Boost
In Sunday's Kris battle, dealing damage to anything other than Kris reduces his cooldown. Either use Asura to apply Focus Target on Kris, or accept some cooldown reduction and instead use Biscuit to raise your attackers' Weakness Hit Chance and boost your score.
| Tips! | When using Biscuit, it's better if your attackers have around 50% Weakness Hit Chance. Also, the higher the Weakness Hit Chance of your other members, the more you reduce the risk of his cooldown being shortened. |
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