Season 2

Rimuru confers a new name upon the council of Demon Lords after his battle with Clayman.

Rimuru and Shion face off against Clayman in a deadly battle

The demon lords' banquet "Walpurgis" begins. Things start to get heated up as Clayman accuses Rimuru with some serious issues in front of the other demon lords.

Shuna, Souei, and Hakurou are confronted by Wight King Adalman, who is guarding Clayman's castle. Walpurgis begins.

The battle heats up as Suphia and Gabiru take on the formidable Middray of the Dragon Faithful while Albis fights it out with Yamza.

Rimuru continues with preparations for Walpurgis, including making Treyni evolve into a Dryas Doll Dryad. Meanwhile, Benimaru and his forces have arrived in Eurazania via transport magic, and they promptly run Clayman's army into a trap set by Geld. The Three Beastketeers, determined to rescue Carrion, set out to subdue the enemy army's leader. Albis fights one-on-one with Yamza of the Five Fingers, while Phobio takes on Footman and Tear.

Demon lords from all over the world react to what happened till now and are getting excited for the next Walpurgis.

Clayman assembles his army to raid the animal kingdom. Rimuru decides to intervene. But Rimuru only has 2 days to move his army to the animal kingdom.

Ramiris tells that Walpurgis is commencing in three days. It is an event where all the demon lords gathers. The agenda for this meeting is Rimuru, the new demon lord.

After a long discussion, diplomatic relations are made between Tempest and the Sorcerous Dynasty of Thalion.

As prominent figures from several nations assemble in Tempest for a meeting, Laplace and his companions formulate a plan centered around Clayman. Then someone familiar joins the discussion.

Tempest welcomes Rimuru and Veldora back with a massive celebration

Rimuru has successfully defeated the Falmuth army and protected Tempest, but there's still a lot of problem at hand. In the middle of that, Raphael comes with news; The Analysis and Assessment of the Unlimited Imprisonment is now complete.

Rimuru succeeds in collecting enough souls to carry out his plan to evolve, and the Harvest Festival begins. But he's suddenly overcome by intense sleepiness at the same time, so he summons a demon to stop Razen, the one target who escaped alive. Then, upon returning to Tempest after successfully becoming a Demon Lord, Rimuru sets about attempting to revive Shion and the rest of the fallen. Through Raphael, the evolved form of Great Sage, the Secret Arts of Spirit Resurrection and Revival of the Dead are activated.

The battle for revenge has begun. Benimaru and his trusted companions carry out their respective missions, while Hakurou and his party face Shogo and Kyoya once again. And Rimuru's fury rains down upon the army from Falmuth.

Rimuru reveals that he was he was a human in his past life. Meanwhile, he must simultaneously deal with the impending attack on his nation while trying to revive those that have died.

Rimuru learns that Shion and the other victims of the invasion can be resurrected as he must prepare from another invation.

Rimuru returns to Tempest to find his city ravaged: many of his subjects were killed. Now, he must prepare for another attack.

Rimuru is ambushed after a reunion with his class. Meanwhile, Falmuth's army invades Tempest

Shogo and two companions are sent to Tempest to cause trouble.

Rimuru hosts his last class before returning to Tempest. The wizard Myulan becomes a military advisor for Tempest.

The alliance between Tempest and Dwargon becomes official. Rimuru visits a familiar place.

The negotiations between Tempest and Eurazania are successful and both countries begin exchanging technologies and establishing trade routes. Some time later, Rimuru pays a visit to Gazel in the Kingdom of Dwargon, unaware that Clayman is preparing another scheme against him and his nation.

Rimuru is preparing for diplomatic relations with the country ruled by the Demon Lord Carrion. He was ready to welcome the embassy from Eurazania, but what showed up was a spectacular-looking tigercart carried by giant Thunder Tigers.

Hinata Sakaguchi receives a letter from a merchant, recalling a story about the Jura Tempest Federation, a kingdom of monsters.