Phaazoid

A Phaazoid is a creature made out of Phazon that can be found on a planet that had its Leviathan destroyed. It can only be harmed by Phazon attacks. If you hit it enough times, it will split into 2 smaller ones. Hit one of those enough that one will split into 2 smaller parts that try to fly into you and explode. You can destroy those with one shot. Sometimes Phaazoids split into a rare red version