Demon Slayer Collaboration Launches in Seven Knights
James Whitfield
4 min read
Seven Knights Re:BIRTH has introduced a Demon Slayer: Kimetsu no Yaiba collaboration that runs until October 29, bringing new playable characters, pets, equipment, and exclusive dungeon content to the mobile RPG. The first phase of the crossover launched on October 1 with two Attack-type heroes from the anime series.
Tanjiro Kamado and Zenitsu Agatsuma join the game as distinct Attack-type fighters with different mechanical focuses. Tanjiro's strength centers on his passive ability, Hinokami Kagura, which revives him in an Unyielding state upon defeat. This state grants him Transparent World, making all his attacks ignore defense and boosting his Weakness Attack Chance to 100%. His skill set includes a basic attack that inflicts Burn, a first skill that deals extra damage based on enemy buffs, and a second skill that strips buffs while dealing bonus damage based on debuffs applied. Higher Transcendence levels unlock additional benefits, including applying Transparent World from the battle start at Transcendence Level 6. Tanjiro also buffs other Attack-type allies with increased Effect Hit Chance and delayed defensive bonuses while weakening enemies.
Zenitsu takes a different approach through his Thunder Breathing passive, which grants Blessing and Shield effects while cleansing crowd control and providing immunity to future crowd control debuffs. His first skill delivers piercing damage to a single target with potential consecutive triggers upon enemy defeat, while his second skill reduces enemy buffs before attacking. Like Tanjiro, Zenitsu provides team support by increasing Critical Hit Chance for Attack-type allies by 21% and reducing enemy Effect Resistance.
Awakened versions of both heroes unlock enhanced mechanics. Awakened Tanjiro gains increased Burn application across all attacks and a skill cooldown reset whenever he defeats an enemy. His Awakening Skill, Hinokami Kagura: Setting Sun Transform, delivers four hits to a single target with potential consecutive casting. Awakened Zenitsu gains buff removal on his basic attack and stronger debuff effects on his skills, with his Critical Hit Chance buff for allies increasing to 25%. His Awakening Skill, Thunder Breathing Seventh Form: Honoikazuchi no Kami, targets the two enemies with highest Attack power, dealing 65% Defense-ignoring damage and executing targets below 26% health.
The collaboration introduces Nezuko Kamado as a new Legendary pet that boosts Attack, Defense, and Max HP for all Demon Slayer faction allies. Players can obtain up to four copies through various events: one from completing 150 hero summons, one from 1,000 farming runs, and two more through the Supply Depot exchange. This allows players to develop Nezuko to 6-Star rank. Collaboration-themed equipment including Nichirin Swords appears among event rewards.
New endgame content arrives in the form of Trial of Infinity, a 10-floor challenge mode accessible after clearing Tower of Infinity Floor 50. Players face Akaza on Floor 5 and Doma on Floor 10, with adjustable difficulty through selectable buffs and debuffs. First-time floor clears award 5 Hero Summon Vouchers, while cumulative achievement medals unlock additional rewards including Rubies, Tuning Crystals, and a 4-Star Legendary Accessory Box at 50 medals. The Demon Slayer Event Dungeon, available after clearing Adventure 2-5, features two parts releasing on October 1 and October 15 respectively, with daily entry ticket recharges and purchasable additional entries for 100 Rubies each.
The update also introduces quality-of-life improvements across multiple game modes. A new Novice Arena welcomes players entering Arena content for the first time, allowing them to compete for three seasons before integration into Standard Arena. Free Sweep functionality arrives for Advent Expedition: God of Destruction, calculating rewards at 95% of personal records on first sweeps and 90% on subsequent sweeps. An Accessory Rental Shop lets players temporarily equip high-grade rings for 1,000 Rubies weekly, with rental mileage working toward Legendary Accessory Box rewards. Real-Time Arena now runs on Tuesdays, Fridays, and Sundays with expanded ticket purchases using Gold, while Total War adds a new Mythic tier at 8,000 points with increased High-Grade Coin rewards.
Players receive free rewards through multiple event tracks. The Demon Slayer Corps Check-In Event distributes a 6-Star Tanjiro on Day 1 and a 6-Star Zenitsu on Day 3, plus 1,000 free Rubies on the final day. The Demon Slayer Corps Special Duty event awards a 4-Star Nezuko copy for completing 1,000 repeat battles and another for 150 hero summons. Additional rewards come from the Supply Operation using Wisteria Flower Coins, the Trial of Infinity based on floor clears and medals, and the Event Dungeon where players exchange Grilled Miso Rice Balls for exclusive hero equipment and accessories. A surprise Push Event running until October 25 grants 20 Collaboration Summon Vouchers and 10 Awakening Stones to players who log in by the deadline. Supplementary events include a lobby coupon hunt, a notice image checking event, and a YouTube channel milestone event tied to the collaboration video.
