The method is old but practical. Back when pollution was affecting the Gray Divine Star, Ange needed to uphold barriers to protect Shamara. But now, with the presence of Molten Fire impurities, Shamara and Luna move like fish in the sea, free and unrestrained.
Molten Fire impurities are elements that can't be melted within the Divine Star Core; they were forged in such an environment and are unafraid of the high temperature and pressure inside a Divine Star. Shamara and Luna use these impurities as their shell, making them much safer than they were inside the Gray Divine Star.
So, Ange tossed them into the Divine Star's interior and paid no further attention, engaging in battle outside to draw the attention of Gemez Fortress. It was only when the pollution became excessive that Gemez Fortress took notice.
