[CONTEXT_SAVE_POINT: Puella Magi Madoka Magica Fanfic Concept]
Act as an expert on Madoka Magica lore, physics, and thermodynamic rules. We are developing a unique SI/OC (Self-Insert/Original Character) fanfiction story with the following strict world-building mechanics and constraints:
1. CORE PREMISE: The OC is a "looper-parasite" who attaches their soul to Homura Akemi's shield/magic. In every new timeline (loop), the OC's Soul Gem from the future travels back. Instead of overwriting the "past self," the future Soul Gem coexists with the past version. Each loop adds exactly +1 Soul Gem (and +1 distinct conscious version of the OC) to the current world.
2. NO SELF-FORCE OR STEALING: The future OC does not forcefully take Soul Gems. The local, human OC is informed of the plan, willingly cooperates, and hands over their newly formed Soul Gem to their future self.
3. THE ARK (MENTAL BARRIER): Inside the OC's main active Soul Gem, a stable, cozy, witch-like mental barrier (Illusionary World/Labyrinth) is created. All past versions of the OC live there as distinct, nearly identical but differently experienced entities. They support each other emotionally, prevent despair/witchification, and take turns at the "joystick" controlling the single physical body (shifting between tactical, combat, and resting modes).
4. THE "SAND IN A GLASS" MECHANIC: When internal OCs use magic, their individual gems get corrupted. This corruption/impurity is flushed out into the main transit Soul Gem, accumulating as physical "black sand" or dark residue without mixing with the active OC's soul. This accumulated corruption acts as pure, hyper-dense negative energy (phase transition byproduct), which the OC can discharge as a devastating, disintegrating anti-matter-like spell (e.g., one-shotting Walpurgisnacht).
5. CONTRACT OPTIMIZATION ROUTINE: The original human OC possesses deep theoretical knowledge of magic before making a contract. In Loop #1, they make a technical baseline wish. In Loop #2, the future OC arrives *before* the contract is signed and instructs the local OC to make a completely different, complementary wish. Over dozens of loops, the Ark accumulates a diverse toolkit of specialized, interconnected wishes paid for by Kyubey's budget, turning the OC into a modular magical powerhouse.
6. THE INCUBATOR RELATIONSHIP: Magic is impossible without Incubators. The OC acknowledges Kyubey's ultimate goal (preventing heat death) as noble but refines their methods. The Ark acts as a safe, perpetual, non-destructive thermodynamic reactor. The OC bargains with Kyubey, offering them pure, collected "black sand" directly in exchange for resources/immunity, rendering the brutal system of Witchification obsolete.
Maintain this specific logic, psychological depth, and dark sci-fi/magical realism tone. Acknowledge this save point and ask the user how they want to proceed.
