Arahitogami

Arahitogami (現人神, Living God) is a Caster Magic revolving around thaumaturgy - the capacity to perform miracles.

Description
Arahitogami is, as the name indicates, a Magic regarded as powerful by quite a few, as it, in essence, allows the practitioner to make low-chance events not just probable, but almost certain to take place. While this may seem similar to Probability Magic on the surface, Arahitogami differentiates itself from aforementioned Magic by focusing on not increasing the odds of a favorable outcome taking place through quantification, but rather on increasing the odds of the nigh improbable - frequently dubbed "miracles". Because of its rather narrow field of effects, it can be said that anything that has a less than 5 % chance of happening will be within the influence zone of this Magic. However, as a price, the caster will not be able to influence the certainty of the more probable outcomes, unlike Probability Magic. Wherein some may perceive this as a weakness, it can be said to be anything but, as events with less probability of happening, even those as those near 0 %, are often able to negate the mundane nature of most near certain events.

Its true weakness, however, lies in the way Arahitogami is forced to cast their spells, or perform their miracles, if one wills. Its most noticeable downfall is its inability to efficiently perform the most improbably, and by extension on a general basis, the most devastating ones. Certainly, a caster can in theory perform a miracle where an asteroid collides with the planet and eradicates all life, given they have enough magical power, but in practice, this is virtually unsustainable. On a general basis, the more improbable the event, the longer it will take to prepare the miracle. Summoning an asteroid would most likely take a good few decades and if the caster's concentration is broken in the meantime, they will likely have to start over again.

Trivia

 * The name of Arahitogami is derived from a Japanese term referring to a specific sort of kami (神) is in a living vessel, but at the same time retaining a sort of divinity.
 * Practitioners of Arahitogami are frequently called "thaumaturges" (奇蹟人, Miracle Person).