Extreme Modification Magical Girl Mystic Lune Guide Link -

Mod 12: Remove her heart. Replace with a resonant Lunar Core. The Guide assured her she didn't need a biological heart anymore—the Core pumped mana instead of blood. Kira asked what happened if it broke. The Guide said, "You stop existing."

It didn't appear as a cute mascot or a wise old sage. It appeared as a crack in reality behind her refrigerator, leaking pale gold light and a voice that sounded like her own, but older. extreme modification magical girl mystic lune guide link