Rimuru Tempest stars in the hit isekai anime series That Time I Got Reincarnated as a Slime as a Japanese businessman reborn as a blue slime in a fantasy world populated with goblins, ogres, lizard people and far more. Rimuru quickly amassed dozens of abilities and magical attributes, and got to work building and defending his very own kingdom.

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Slime takes care to nerf Rimuru here and there to maintain some tension and give him a proper character arc, but overall, it's easy to say that he fits the "overpowered isekai hero" trope. He is more compelling than just a mere power fantasy, but still, Rimuru is wildly overpowered, and that's what makes Slime exciting and fun. What kind of powers, advantages and abilities does Rimuru have to make him so powerful?

10 Rimuru Has The Predator Skill

rimuru tempest

One of Rimuru's most essential abilities of all is the Predator skill, and this particular skill is what allowed him to gain most of his other powers. Rimuru was reborn with the Predator skill, and he used it to devour many giant monsters inside that cave, including Veldora the storm dragon.

Rimuru can analyze anything he eats this way, and obtain the skills and attributes of his prey. With Predator, Rimuru emerged from the cave already loaded with unique powers and abilities, and he was just getting started.

9 Rimuru Doesn't Need To Breathe

rimuru tempest the slime

This particular strength doesn't come up often, but from time to time, it can be rather helpful, and it's an advantage that few organic anime characters have. Rimuru Tempest may look human, but he is truly a slime, and slimes do not need to breathe air or filter oxygen from water to live.

Rimuru can spend any amount of time underwater without gills and survive, and he is immune to suffocation or poison gas in the air, which could give him a surprise advantage against some foes. Rimuru really only uses air to talk, not to get oxygen.

8 Rimuru Can Use Telepathy

rimuru slime reincarnated

Not many anime or comic book characters are telepathic, and this power can give someone a serious advantage, such as Professor X of X-Men fame. Rimuru has telepathy as well, mostly because his default slime body doesn't have a mouth or lungs for regular speech.

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Early on, Rimuru used his telepathy exclusively, and he only used regular speech after he ate Shizue Izawa and gained a human form. And during battle, Rimuru can use telepathy to coordinate the efforts of his many powerful allies, even Veldora or Diablo.

7 Rimuru Can Use Mass Teleportation

rimuru using his teleport spell

During Season 2, Rimuru was getting ready to confront his nemesis, Demon Lord Clayman, and he needed a way to intercept Clayman's army in the Animal Kingdom right away. It was too late to march his army into position, so Rimuru decided to use teleportation magic.

He didn't just teleport a handful of elite fighters to the battlefield, though. Rimuru astonished everyone when he used a mass teleportation spell to deliver entire battalions to the Animal Kingdom, including fighters such as Suphia and Albis of the Beastketeers.

6 Rimuru Has Gazel Dwargo To Coach Him

gazel dwargon that time I got reincarnated as a slime

Rimuru has to be more than a fighter -- he must also be a skilled politician and diplomat, but his human life didn't prepare him for any of this. Rimuru is slowly but surely learning the ways of statecraft and politics, and he has a helpful guide on hand.

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King Gazel Dwargo of the Armed Nation of Dwargon is happy to coach Rimuru on the ways of statecraft, and he even taught Rimuru how to deliver more inspiring and effective speeches to the crowds. And Gazel is asking for very little in return.

5 Rimuru Summoned a Primordial Demon

diablo noir polite gesture in slime

Rimuru has made many powerful allies by now, and each of them is a formidable asset. In fact, an alliance with any one of them would make Rimuru overpowered by this world's standards, and that includes Rimuru's alliance with a primordial demon known as Diablo/Noir.

Diablo once clashed with Shizue in the past, but now he is Rimuru's strongest ally of all, and he can effortlessly demolish Rimuru's enemies. He is also utterly loyal to Rimuru and even volunteered to be his secretary, alongside a rather jealous Shion.

4 Rimuru Is Part Of Octogram

lord leon cormwell, guy crimson and rimuru tempest from reincarnated as slime

There used to be ten Demon Lords in the world, from Clayman and the fairy queen Ramiris to Leon Cromwell and the harpy queen Frey. Later in Season 2, Rimuru took part in Walpurgis, or the meeting of Demon Lords, and transformed it.

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In short, the Demon Lord council was reduced to eight members instead of ten, and Rimuru was allowed to name the new group Octogram. Now Rimuru has serious political clout with some of the world's strongest individuals, which is saying a lot. Octogram is no laughing matter.

3 Rimuru Can Revive The Dead

rimuru slime casting megido spell in That Time I Got Reincarnated as a Slime

Rimuru Tempest knows that Shizue is dead and gone, but when the Falmuth Kingdom wiped out nearly half of Rimuru's friends, Rimuru decided to challenge the Grim Reaper. Rimuru used Milim Nava's story as reference, and decided to harvest human souls to fuel a grim piece of magic.

Rimuru slaughtered thousands of Falmuth and Church soldiers to become a True Demon Lord, and he captured all the souls of his fallen friends within a large barrier. Finally, he placed those souls into his fallen friends, and they returned to life. Shion was among those revived.

2 Rimuru Has Great Sage

That Time I Got Reincarnated As A Slime The Great Sage

One of Rimuru's first allies was the mysterious mental entity known as the Great Sage, and only Rimuru can access Great Sage. Its appearance and behavior are like a typical AI program, and it provides all sorts of intel and suggestions for Rimuru's reference.

With Great Sage, Rimuru can analyze any spell or magical monster, and if Rimuru can't think his way out of a situation, he'll ask Great Sage for input, and the Sage will provide it at once. Later, Great Sage evolved further into Raphael and gained a little more personality along the way.

1 Rimuru's Nation Is Heavily Defended

rimuru at a meeting slime

Rimuru's capital city is an extension of himself, and if his kingdom is well-defended, then so is he. Many of Rimuru's strongest allies are ready to defend not just the kingdom, but also Rimuru himself, and Rimuru tends to fight defensive battles. He is never alone.

If any raiding party, army or monster attacks the city, they'll have to fight their way through a diverse army of powerful defenders, from Geld the orc commander to Veldora, Benimaru the swordsman and even Milim and Diablo. Few isekai heroes aside from Ainz Ooal Gown have so many powerful bodyguards.

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