Phazon

Phazon is a highly raidoactive mineral. Its origin is unknown. First encounter with phazon was on Planet Tallon IV, chozo lore states that phazon came in a meteorite with the unholy worm (metroid prime), two kinds of phazon were encountered there, red and blue. Red phazon, 86% more radioactive than blue phazon, was only encountered on the impact crater, but never on prime´s chambers. After prime was defeated by Samus Aran, it absorved Samus´ phazon suit, and evolved into Dark Samus. Second encounter was on planet Aether, home planet of the Luminoth. In Aether, a meteor similar to the one on Tallon IV crashed, and the phazon in it created Dark Aether. Dark Aether was Aether´s twin, based of dark matter and in another dimension. Samus eventually destroyed Dark Aether. Note that there was never encountered Red Phazon on Aether.

.