Re:Life Zero

"If you had the power to change the future, how would you do it? Furthermore, would the outcome be any different?"

- Common questions that are asked whenever someone mentions this event.

Re:Life Zero (, Re Raifu Zero; lit. "Reversion to Original Starting Point") is a Magic Phenonmenon that involves the use of the space-time continuum and the victim in-question; it's also considered to be a form of Caster Magic, as it can be activated remotely — even though such a thing is deemed impossible by normal means. The essence of this magical event allows the victim to "re-start" certain events through their death, giving them a chance to "change its outcome". In a sense, one can consider this to be time travel at its finest.

Very few people are subjected to this phenomenon; amongst them, the most infamous one is Masaru Mikoshiba — a mage with a relatively low magical prowess and someone who's borderline "ordinary", having suffered its effects on multiple occasions. It's unknown why he's subjected to its powers, something many have attempted to figure out. It's because of this that people gave him the moniker of "Forlorned Puppet Child of Karmic Suffering" (業苦の非力操り少年, Gōku no Hiriki Ayatsuri Shōnen) — alluding to him being constantly subjected by fate itself against his whims, which usually ends up with him in distress more than he imagines.

Overview
"If you were gonna compare this phenomenon to something, what best suit it would the "backspace" button on a computer or the "delete" function on a phone whenever you wanna erase something and do it right the next time. Simple, ain't it?"

- A philosopher easily, yet eloquently summing up this phenomenon.





Butterfly Effect
"Just because you're able to go back into the past, doesn't mean that everything will go the way you want it. Sometimes interference can lead to results that are.... less desired."

- A scientist warning another about the dangers of travelling to the past through this phenomenon.





Trivia

 * This is considered to be one of the few magics that's known to be constantly active, thus unable to be shut-off, controlled, nor cancelled through any method. This is partly due to it being a phenomenon, thus something that's natural — being a force all on its own.
 * The concept behind the technique is wholly based on the Revival phenomenon used by Satoru Fujinuma from the series Boku Dake Ga Inai Machi (ERASED) and the Return by Death power belonging to Subaru Natsuki from the light novel series, Re:Zero Kara Hajimeru Isekai Seikatsu. The two series are considered to be one of the author's personal favorites for many reasons, one of which deals with the aspect of time manipulation for the respective main characters.
 * It should be added that the magic's user is based on the latter, whom the character liked for multiple reasons despite being a skeezy dorkwad.


 * The blue butterflies seen around Masaru before the phenomenon activates alludes to the butterfly effect. It's part of the infamous chaos theory — which states that small alterations in the past could drastically change future events.