Origin

The words "No more mutants" were uttered by the Scarlet Witch, depowering nearly every mutant alive. The powers were all sent to a mutant named Michael Pointer who happened to live in North Pole, Alaska. Michael Pointer was a postal worker, and he brought an entirely new meaning to the term "Going Postal."

Xorn

The Collective traveled through Canada, killing Alpha Flight when they stood in his path. He found himself in The United States, taking on the New Avengers, but not killing anyone, simply ignoring them. He then realized that he could fly, as he had walked the entire way, discovering new powers as he went along.

He fought with Iron Man and Sentry in space using his newfound flight powers. He made quick work of them, and continued traveling towards Genosha. Then The Collective restored Magneto's powers.

Magneto realizes that Xorn is the consciousness controlling The Collective (Xorn's personality is dominant among all of the others, including Michael's, within the collective). Xorn explains that the mutants need Magneto, that they will follow and listen to Magneto. This is why Xorn came to return his powers.

Ms. Marvel, Iron Man, and The Sentry combine their powers and send The Collective into the Sun.

Michael is separated from The Collective during the fight, and is held in captivity by the New Avengers. He is later transferred to Canada to serve as the new Guardian in the newest incarnation of Alpha Flight, now named Omega Flight.

Omega Flight

Michael Pointer was put in jail for causing the death of so many included Alpha Flight, he was later brought back to replace the Guardian by Sasquatch who was the only surviving member of Alpha Flight.

The newly formed Omega Flight of Talisman, Beta Ray Bill, US Agent, Arachne, and Sasquatch where reluctant to have Pointer on the team but after putting on the Guardian costume and saving the team from the Wrecking crew and the daemons they unleashed the team had a different attitude towards him.

Powers

As The Collective he had all the powers of the mutants depowered after House of M, after the separation Michael kept some residual power, we haven´t seen how many powers he does keep until now he can fly at unknown speeds and can discharge powerful energy blasts.