After leaving the cave, Rimuru finds a village of weak Goblins under siege by a pack of Direwolves. Despite being a simple slime, Rimuru uses his newly acquired skills—like and Water Blade —to set a trap. The climax occurs when Rimuru consumes the Direwolf leader, decapitating the threat and immediately absorbing his form and skills, including Menace . The Transformation: The Power of Names

When he wakes up, the creatures have evolved. The frail village elder becomes the buff Rigurd , and the Goblins transform into larger, more capable Hobgoblins . New Rules for a New Society

The process is so taxing that Rimuru falls into a "sleep mode" for three days to recover his energy.

Rimuru decides to name every Goblin and Direwolf to foster unity, not realizing that naming a monster in this world consumes a massive amount of the bestower's Magicules.

You can catch this episode and the rest of the series on Crunchyroll or Funimation .

The most pivotal moment of the episode is the introduction of :

Tensei shitara Slime Datta Ken - Episode 3 discussion : r/anime