Summary

  • Demon Lords in anime possess immense strength and control vast territories, requiring specific criteria to become one.
  • Evolving into a Demon Lord seed involves a dark process, including a Harvest Festival that requires taking 10,000 human lives.
  • The True Demon Lords form a council of the most powerful monsters, with membership based on specific conditions and alliances.

Fantasy worlds in anime are home to some of the strongest monsters, and That Time I Got Reincarnated As A Slime even takes it up a notch. Their Demon Lord system is a significant political power structure birthed from the ability of monsters to evolve to keep the human population in check through culling.

The monsters who evolve into Demon Lords possess immense strength and control vast territories, armies, and sometimes entire nations. Rimuru’s journey through his new world features encounters with monsters on this level so fans must understand the Demon Lord system.

That Time I Got Reincarnated as a Slime Rimuru Luminous Guy
That Time I Got Reincarnated as a Slime: Every Great Demon Lord, Ranked By Strength

From a fairy queen to a primordial demon, this is the strongest great demon lord in That Time I Got Reincarnated as a Slime.

1

The Evolution Of Demon Lords

The Strongest Monsters

The concept of Demon Lords is rooted in the ancient history of their world, as they have existed for over two thousand years. Demon Lords are feared beings in terms of power and influence and are second only to the True Dragons in That Time I Got Reincarnated As A Slime, but the path that leads to becoming one is very arduous. There are a lot of criteria that need to be met for a monster even to be considered as a potential Demon Lord. They need to be at least Special-A Rank or have a Calamity-class danger level, meaning they have the latent ability to destroy a small country, have a host of subordinates that consists of high-ranking Majin, and can only be challenged by the full might of a nation’s armed forces or a Champion-class human.

In terms of magical ability, they are required to have an existence value of 200,000, which is a way of measuring the energy possessed by an individual, in terms of magicules, mana, aura, and holy power. Monsters who meet all these criteria are called Demon Lord seeds, and they need to undergo a Harvest Festival to break all limiters and unleash their full potential.

The Process Needed To Evolve From A Demon Lord Seed Is A Very Dark One

The Cost Of Immense Power

Reincarnated Slime Rimuru Demon Lord

Once a monster meets all requirements to become a Demon Lord seed, it needs to undergo a phenomenon known as the Harvest Festival to become a True Demon Lord and attain new heights. The Demon Lord seeds can only be germinated and harvested by taking ten thousand human lives, as their souls are required.

This process culls the human population as every Demon Lord candidate who wishes to awaken his true power would have to sacrifice many human lives in their quest for power. Rimuru Tempest’s Harvest Festival was on display for everyone to see, as he took no time slaughtering the Kingdom of Falmuth’s twenty-thousand-man army that dared to attack his sanctuary, killing a lot of his friends and citizens. After this Harvest Festival, Rimuru’s skills became Ultimate Skills, and his magicule capacity increased exponentially.

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That Time I Got Reincarnated As A Slime: 15 Strongest Characters, Ranked

That Time I Got Reincarnated As A Slime hosts overpowered characters that make the isekai series a delight to watch.

5

The True Demon Lords And Their Supreme Council

An Organization Of The Most Powerful Monsters

True Demon Lord is a term used to refer to those who have awakened from Demon Lord seeds and earned their place on the Demon Lord Council. There are only eight True Demon Lords in the story, and they are distinguished in social status from the other Demon Lords who have passed the Harvest Festival but have not been selected to join the council.

Demon Lords are classified under Disaster-class threats and possess enough destructive capacity to go up against a large nation like Englassia, and their full military might including all their Champions. They often have an existence value of between 400,000 and 800,000, but this pales in comparison to the might of True Demon Lords who possess over 800,000. Only an alliance between nations or a Chosen Hero can stand up to these Catastrophe-class monsters, although they are not officially recognized as that.

The Demon Lord Council is an organization of these True Demon Lords, created by Guy Crimson in collaboration with Milim Nava and Ramiris (a group also known as Ancient Demon Lords who were the first set of Demon Lords to come into existence) two thousand years ago to oppose Rudra. The number of members and name of the organization has changed several times throughout the years, and it consists of highly influential and powerful monsters who lead monster societies. The organization first went by Ten Demon Lords, before switching to the Octagram, which only allows a maximum of eight members, which consists of Rimuru Tempest, Leon Cromwell, Luminous Valentine, Dino, and Draguel, in combination with the three founding members.

An association of some of the biggest characters and egos in the series is bound to have their differences from time to time. So the Walpurgis banquet was birthed to bring these world powers together to mediate over disputes, alliances, treaties, and other things through a majority vote system. As with everything else that involves being a Demon Lord, to join this all-powerful council, the Demon Lord must meet several conditions, including the backing of three council members and a Walpurgis-made decision to move forward with their recruitment. When Demon Lord Seed pops up and declares himself as a Demon Lord the council sends a member to test their ability. Those who pass this test are considered at a Walpurgis where their inauguration is voted upon, and those who fail are condemned to death by the council.

That Time I Got Reincarnated As A Slime is available to stream on Crunchyroll.

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That Time I Got Reincarnated as a Slime TV Series Poster
That Time I Got Reincarnated as a Slime
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Release Date
October 5, 2018
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Based on Fuse's novel and light novel series, That Time I Got Reincarnated as a Slime is an isekai anime that follows Rimuru, a guy who reincarnates in a fantasy world as its weakest monster. However, that soon changes.

Studio
8bit
Creator
Fuse
Number of Episodes
72
Streaming Service(s)
Crunchyroll