Nate Grey
Onslaught remained dormant for some time but subtly began influencing Charles Xavier. After an attempt to spy on the new mutant Nate Grey, a refugee from the world known as the Age of Apocalypse, resulted in the latter pulling Xavier from the astral plane into the real world, the aspect of Onslaught in Xavier was able to use this experience to 'teach' itself how to manifest its own body.