Leviathan seed

leviathan seeds are Phazon generators. In every seed you go to you must defeat the boss waiting inside and overload the core with Phazon. It is said that Samus Aran is the only one who can destroy these seeds. These seeds are only in Metroid Prime 3 Corruption. There are 3 to destroy, each located in a different area. These areas are: Bryyo, Elysia and the Space pirate homeworld. the bosses in the seed are: Mogenar in Bryyo, Helios in Elysia and Omaga Ridly in the Space Pirate Homeworld