Law of Cycles

The Law of Cycles(円環の理Enkan no Kotowari)is the law that Madoka Kaname Made.

The Law of Cycles is a concept wished into existence by Madoka Kaname. It’s only directive in the universe is to erase Witches before they are born. Which it does by absorbing the despair of Magical Girls from their Soul Gem at the moment it would transform them into a Witch.

The Law of Cycles and Madoka Kaname together make up the existence known as Ultimate Madoka.

In episode 12 of Puella Magi Madoka Magica, Madoka Kaname wished to erase all Witches before they were born. This wish took form in the concept known as the Law of Cycles.

From its creation, Madoka is able to visit all Magical Girls in their final moments, absorb their despair, taking on their burden and allowing them to pass on peacefully.

The Law of Cycles is omnipresent, but not self-aware. If a pocket dimension is created, as it is in Rebellion, the concept will not be present there, unless it were allowed to influence the pocket dimension.

The Law of the Cycle can be split from the existence known as Madoka Kaname and has been done at least twice so far, both times occurring in Rebellion.

The first was in a plan by Madoka Kaname, Sayaka Miki, and Nagisa Momoe to infiltrate the barrier the Incubator’s set up around Homura’s own Labyrinth. Through that, Sayaka and Nagisa were responsible for the Law of Cycles, and ensuring it could be returned to Madoka safely after they completed the mission.

The second occurred after the completion of their mission. When Homura split Madoka Kaname from the Law of the Cycle. This is later confirmed by Sayaka’s conversation with Homura, where Homura states she tore off a piece of the Law of Cycles.