Mana 「魔力, maryoku, lit. "magic power"」 refers to the energy used to perform a wide variety of actions, such as manipulating magicules, holy power, and spiritrons, activating and maintaining the use of skills, casting magic, and naming.[2]
Properties[]
Mana is, in and of itself, not a specific type of energy, but rather the aggregate of several different energies. Its comprised of the material body's vitality 「生命力, seimei-ryoku」 and the spiritual body's spiritual power 「精神力, seishin-ryoku」,[3] with soul power 「魂の力, tamashī no chikara」 likely also falling under this categorization.
Mana can be considered analogous to stamina, with a state of low mana resulting in physical exhaustion or mental lethargy.[3][4] It can be recovered in the ways that one would expect going by this description, with sleeping and eating being the most common among them.[3] Additionally, for those that have a sufficient tolerance towards magicules, it is possible for their bodies to metabolize an excess amount into energy, which results in a rapid restoration of expended mana.[5]
In extreme cases, the depletion of mana past a certain limit can result in permanent damage or even death.[3] However, given that most individuals would pass out long before reaching this point, this is an extremely rare occurrence. This typically only happens if one's mana is being drained by an outside source. Similarly, if one's physical condition becomes impaired such as by neglect, damage, or aging, their mana will decrease.[6]
When a being is utilizing their mana, it is normal for it to leak out of their body and into their surroundings in the form of waves.[7][8] It is also possible for someone to imbue their mana into objects, allowing for the activation of magic by someone incapable of even casting it, even if it has a limited number of uses.[9]
The exact wavelength of an individual's mana is different from person to person, similar to a fingerprint. This allows for those more sensitive to mana and those possessing the extra skill Mana Perception to identify individuals based purely on their mana regardless of their physical appearance.[10]
Mana circuits[]

Mana circuits 「魔力回路, maryoku kairo」 are a type of pseudo circulatory system found within the bodies of beings like majin and Spiritual life-forms.
While normal life-forms like humans and Demi-humans store their mana within their blood and run it through their circulatory system,[3] magical and spiritual beings, which have abnormal physiology, use mana circuits to circulate energy through their bodies.[11]
It is possible for these mana circuits to be interfered with and blocked by effects such as curses and advanced applications of fighting spirit. This will make it difficult to accumulate energy and slow down the healing process.[12]
Related abilities[]
Skills[]
- Mana Jamming 「魔力妨害, maryoku bōgai」
- Mana Manipulation 「魔力操作, maryoku sōsa」
- Mana Measurement 「魔力測定, maryoku sokutei」
- Mana Perception 「魔力感知, maryoku kanchi」
Arts[]
- Mana Bullet 「魔力弾, maryokudan」
Other[]
- Mana Resistance 「魔力抵抗, maryoku teikō」
Gallery[]
References[]
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 3, Chapter 2
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 1, Chapter 2
- ↑ 3.0 3.1 3.2 3.3 3.4 That Time I Got Reincarnated as a Slime light novel (Spin-off): How to Spend a Certain Vacation, Chapter 6
- ↑ That Time I Got Reincarnated as a Slime manga — Chapter 44 (pg. 28)
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 8, Chapter 1 (pg. 110)
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 1 — The Girl and the Hero
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 1, Chapter 4
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 4, Chapter 4
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 1 — Gaiden
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 9, Chapter 4
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 19, Interlude
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 15, Chapter 5