Fans of the anime Tensei Shitara Slime Datta Ken (転生したらスライムだった件), also known as 転スラ (Tensura), have reason to celebrate — the unique letter-battle RPG 共闘ことばRPG コトダマン (Kotodaman) has officially announced its second collaboration event with the series, set to begin on Monday, May 25, 2026, for a limited time.

About Tensei Shitara Slime Datta Ken

Tensei Shitara Slime Datta Ken is a beloved isekai series following a reincarnated protagonist who becomes a slime in a fantasy world, using various acquired abilities to build alliances through wit and courage. The original story was written by Fuse on the website “Shosetsuka ni Naro,” with total sales across the series exceeding 56 million copies, and a manga adaptation by Kawakami Taiki.

The TV anime’s first season began airing in October 2018, followed by the theatrical film Gekijoban Tensura: Guren no Kizuna-hen in November 2022 and the three-episode OVA Tensura: Korius no Yume in 2023 to celebrate the 10th anniversary of the web novel. Most recently, the second theatrical film Sokai no Namida-hen was released in February 2026, and TV anime Season 4 (split into 5 cours) began airing from April 2026.

Characters in the Second Collab

Players will encounter Tensura characters via the “コラボ召喚 (Collab Summon)” system, including:

• Rimuru (Star Demon Lord / 八星魔王)
• Veldora
• Shuna
• Shion
• Milim (Dragon Outfit / 竜装)
• Ramiris & Beretta
• Luminous

Additionally, the first collab’s Summon banner will be re-run, along with a “Tensura Part 1 Free Summon” offer, giving players another chance to pull characters from the original collaboration.

Special “Diablo (Demon Duke)” Pack and Collab Quests

To celebrate the second collaboration specifically, the game is releasing a “Diablo (悪魔公) Pack” for purchase, granting the character Diablo (Demon Duke). During the collab period, if Diablo (Demon Duke) is set as the leader in most collab quests (some quests excluded), players will immediately receive rewards equivalent to the “満福 (Manpuku)” status.

The collab quests will also feature boss characters crossing over from Rimuru’s story, including Hinata, Mariabel, and Clayman.

Rewards and Bonuses for Players

Players who log in for the first time during the collab will immediately receive “[転スラ] Part 1 Free Summon 10-Pull Tickets” — 5 tickets instantly. Starting Tuesday, May 26 at 04:00 through Monday, June 15 at 03:59, players can earn one additional ticket per day, up to a maximum of 5, allowing a total of up to 100 pulls in the Tensura Part 1 Free Summon.

Campaign on X (Twitter)

To celebrate the collab launch, a social media campaign is being held on X, with special prizes for lucky winners: a “Eraberupay® gift card worth 5,000 yen” (10 winners) and “Niji no Kotodama (虹のコトダマ) x 1,000” (5 winners) for those who post using the hashtag #コトダマン転スラコラボ. Campaign period: Friday, May 22, 2026 at 12:00 – Sunday, May 24, 2026 at 23:59.

How to enter: Follow the official Kotodaman and Tensura X accounts, then repost the designated post or post with the hashtag #コトダマン転スラコラボ.

Collaboration Schedule

• Main collab period: May 25, 2026 (approx. 16:00) – June 15, 2026 (15:59)
• Further details: To be revealed on the “GOD Station” program on Kotodaman’s official YouTube channel on Sunday, May 24, 2026 at 20:00.

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Source: aniani