Lumigek

Lumigeks are creatures found in the Metroid series, and speciffically Metroid Prime for the GameCube. They have a notable and rather fantastic ability to not only withstand phazon but also use it against their opponents, making them nasty creatures. Because of this, they're generally found near phazon, possibly because otherwise they're defenseless against predators.

Despite being able to use phazon, they seem to be easily killed by Samus Aran.