4 iconic moments · verified episode numbers · no spoiler ratings
| Episode | Moment | Type |
|---|---|---|
| Ep 1 | Satoru Dies — Rimuru Tempest Is Born | Arc Start |
| Ep 5 | The Goblin Village — Rimuru's First Nation | Moment |
| Ep 24 | Rimuru Becomes a Demon Lord — Shion's Resurrection | Power-Up |
| Ep 48 | Rimuru vs Clayman — Walpurgis Night | Battle |
Satoru Mikami is killed by a random attacker and reincarnates as a slime in a fantasy world. He befriends the sealed Storm Dragon Veldora, who names him Rimuru Tempest. His unique skill "Predator" — the ability to absorb and replicate any ability — gives him the foundation of his future nation.
Rimuru saves a goblin village from dire wolves and names every goblin personally, giving them power that allows them to evolve rapidly. The foundation of the future Jura Tempest Federation is laid in a village of 100 goblins.
Rimuru's subordinates are massacred by Falmuth Kingdom's army. Rimuru harvests 10,000 human souls to evolve into a True Demon Lord and resurrects everyone who died, including Shion. The friendly-nation-building protagonist crosses a line he acknowledges fully.
Rimuru arrives at the Walpurgis Council — a gathering of Demon Lords — and dismantles Clayman's schemes in front of every Demon Lord. The victory establishes Rimuru as a genuine Demon Lord in the eyes of the most powerful beings in the world.
Episode numbers are verified against the aired broadcast order. That Time I Got Reincarnated as a Slime is the property of its respective creators and studios.