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That Time I Got Reincarnated As A Slime: 8 Best Magic Spells, Ranked

That Time I Got Reincarnated As a Slime is one of the more successful isekai series around, having not only a long-running light novel series, but a popular manga series and an even more popular anime series with a third season on its way. The story features a main character that gets reincarnated as a slime, and uses his unique powers to carve out a nation for him and the monsters under his protection.



As a story set in a fantasy world, That Time I Got Reincarnated As a Slime naturally features magic, with many different types and categorizations depending on the person casting the spell or the source of power behind it. Here are some of the best spells used in the series.

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8 Black Lightning

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Black Lightning is a powerful Dragon Magic spell that can summon a bolt of lightning down on a target. Unless the target is able to resist it, they can be vaporized instantly.

Though it was originally part of Veldora’s Storm Magic spells, Black Lightning became an innate skill used by Tempest Star Wolves. Rimuru learned this skill when he used Mimicry to turn into a Tempest Star Wolf himself. Ranga would also learn the spell when he eventually evolved into a Tempest Star Wolf.

7 Demon Summoning

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Summoning magic is an incredibly costly type of spell, one that costs a large amount of magicules to even cast. Furthermore, when it comes to summoning demons, the demons often require some amount of sacrifice, making this quite the expensive spell indeed. Still, the effects can be quite potent, as it allows the summoning of powerful demons that are bound to the caster.

Rimuru casts Demon Summoning in the midst of his conflict against the Kingdom of Falmuth. Of the three demons summoned, the most prominent is Diablo, who becomes one of Rimuru’s most stalwart allies.

6 Inferno Flame

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Inferno Flame is the ultimate Flame Spirit Magic spell, which summons a torrent of flames that are even hotter than those created by Nuclear Cannon. Its usage of spiritrons allows the spell to pierce through any defense.

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Though this spell is incredibly powerful, it requires the user to be in accord with the fire spirits. While this can be difficult for some, it is easy for someone like Shizu, who is possessed by Ifrit, a Greater Elemental of Flame.

5 Nuclear Flame

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Nuclear Magic is one of the most powerful types of Elemental Magic, requiring the use of Abyss Cores in order to successfully cast. Human casters often need to cast nuclear spells in a group, with the exception being powerful characters like Razen.

Nuclear Flame is a Nuclear Magic spell used by Lacua in his fight against Rimuru. Though it had the power to destroy an entire area, Rimuru defeated it easily with his Beelzebub. Despite that, the spell was sure to have flattened the entire landscape had Rimuru not stepped in.

4 Marionette Heart

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Marionette Heart is a Mental Magic spell that swaps out the heart of the target with a magical device, making them subservient and obedient to their master. The magical device can convey sound back to the caster, and the caster can turn the target into a Majin by sending magicules to the device.

This spell is one of the signature spells of Demon Lord Clayman, who used it to control his subordinates as if they were puppets. He kept the details of his spell a secret so that others would not be able to find a way around it.

3 Disintegration

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Disintegration is the most powerful offensive Holy Magic spell. Anything in the spell’s range begins to experience spiritron decay, and are destroyed instantly. The only flaw of the spell is its rather limited area of effect, making it less effective against large monsters.

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There are stronger versions of Disintegration that increase its effectiveness, including Trinity Disintegration, which stacks Disintegration three times on top of each other. Hinata Sakaguchi has even been shown to imbue her sword with Disintegration, drastically bolstering her offensive power.

2 Drago Nova

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Drago Nova is a True Dragon Magic spell utilizing the power of the Star King Dragon. It is used by Demon Lord Milim Nava, and it is essentially her most powerful spell.

Drago Nova is a unique spell created by Milim Nava, and as a result, its particular attributes are not exactly known. It is, however, incredibly powerful and capable of leveling the landscape in a single moment. Milim can also cast a weaker version of the spell called Drago Buster that acts on similar principles. Though its power is lower, it is still an incredibly powerful spell capable of destroying monsters like Charybdis.

1 Megiddo

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Megiddo is the first of Rimuru’s unique Physics Magic spells, a type of magic that does not use magicules or spiritrons in any way. The magic uses water lens to refract sunlight and focus it until it has lethal power. The light then rains down as an innumerable number of lasers, slaughtering anything within its range.

Megiddo is among one of Rimuru’s most powerful spells, killing thousands in an instant. It can be used even in situations where using normal magic is not possible. Though it used to require daylight, the existence of Raphael means it is no longer a necessity.

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That Time I Got Reincarnated as a Slime

Release Date
October 2, 2018

Creator
Fuse

Genres
Action, Adventure, Isekai

Studio
Eight Bit

Seasons
2

Number of Episodes
48+

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