Lodestar

Lodestar is a Biosovortian. Lodestar has a floating metal head with green eyes and have mainly black and yellow bodies which somewhat resemble a bee's body. He was known to be the "Unknown Omnitrix Alien" from the very end of War of the Worlds: Part 2. Its name comes from "lodestone", a naturally magnetic form of rock. It was confirmed by Dwayne McDuffie that Lodestar has super strength too.

Abilities
Lodestar has electric-magnetism powers, as shown in the episode Simple. Lodestar has the ability to increase his magnetic powers and overload electric ciruits and tear away metal. Lodestar also has the abilty to magnetize any metal object. He also has super strength.

Trivia

 * Lodestar appears to have a mouth but it never opens.
 * Lodestar's steel floating head signifies his magnetic ability.
 * In the episode Simple, Ben uses Lodestar for less than two minutes.
 * Lodestar's species was revealed in Vendetta.
 * Lodestar will appear in the game Ben 10 Alien Force :The Rise of Hex as a playable character.
 * Almost every time Ben turned into Lodestar, Ben tried to turn into Humongousaur.