The second collaboration between the anime That Time I Got Reincarnated as a Slime (commonly known as TenSura) and the word-battle RPG Kotodaman (full title: Kyoutou Kotoba RPG Kotodaman) has been announced for a limited time starting Monday, May 25, 2026.
About TenSura
Based on the web novel by Fuse, which began serialization on Shousetsuka ni Narou, That Time I Got Reincarnated as a Slime follows a protagonist who is reborn in another world as a slime and uses his acquired skills and wit to gain allies. The light novel series has surpassed 56 million copies in print, and a manga adaptation by Kawakami Taiki is also ongoing.
The TV anime first aired in October 2018. In November 2022, the first film, That Time I Got Reincarnated as a Slime: Scarlet Bond, hit theaters. As part of the “TenSura 10th Project” celebrating a decade of the web novel, the three-episode OVA That Time I Got Reincarnated as a Slime: Coleus’ Dream was distributed in November 2023. The second film, The Tears of the Blue Sea, premiered in February 2026, and the fourth TV anime season (split into five cours) began broadcasting in April 2026.
Collab Characters and Summons
For this second collaboration, the following characters appear in the collaboration summon: Rimuru (Octagram Demon Lord), Veldora, Shuna, Shion, Milim (Dragon Equip), Ramiris & Beretta, and Luminous.
Additionally, the first collaboration summon is being revived. A “That Time I Got Reincarnated as a Slime First Collab Free Summon” campaign will run alongside it.
Veldora (after evolution)
Diablo Pack and Leader Bonus
A special “Diablo (Demon Lord) Pack” commemorating the second collab is on sale. Purchasing it grants you Diablo (Demon Lord). During the collaboration period, in most collab quests, setting Diablo (Demon Lord) as your leader will earn the same rewards as a max-fuku (good fortune) unit. (After clearing a quest, the “fuku bonus” reward is obtained according to the probability based on the number of “fuku” of the Kotodaman set as leader. With max fuku ★6 fuku 99, you are guaranteed to get two “fuku bonus” items.)
Diablo (Demon Lord)
Collab Quest Enemies
Three enemy characters from the series appear in collab quests: Hinata, Mariabell, and Clayman.
Hinata
Clayman
Mariabell
Login Bonuses and Free Summons
Upon logging in for the first time during the collab period, players will receive five “First Collab Free Summon 10-Roll Tickets” for use in the “That Time I Got Reincarnated as a Slime First Collab Free Summon.” Additionally, from 4:00 AM on May 26 (Tuesday) to 3:59 AM on June 15 (Monday), you can earn one such ticket per login per day, up to a maximum of five. Using these tickets, you can take up to 100 rolls in the revived first-collab free summon.
Up to 100 rolls! Summon tickets allowing you to obtain first-collab characters
X Campaign and Stream
To celebrate the collab, an X (formerly Twitter) campaign is underway offering “Erabelle Pay(R)” worth 5,000 yen and 1000 “Rainbow Kotodama” to winners by lottery. Participants must follow both the official Kotodaman X account and the official TenSura anime X account, repost the campaign post, and post with the hashtag #コトダマン転スラコラボ. Prizes: Repost campaign – 5,000 yen Erabelle Pay for 10 winners; Hashtag post – a set of collab summon Kotodaman from That Time I Got Reincarnated as a Slime for 5 winners.
Full details of the collab will be revealed during the Kotodaman official broadcast “GOD Station” on the Kotodaman official YouTube channel on Sunday, May 24, starting at 8:00 PM (JST). The program will be available as a premiere.
Collab Period: May 25, 2026 (Mon) around 4:00 PM – June 15, 2026 (Mon) 3:59 PM
X Campaign Period: May 22, 2026 (Fri) around 12:00 PM – May 24, 2026 (Sun) 11:59 PM
(C) Kawakami Taiki, Fuse, Kodansha / TenSura Production Committee
