Personal Info:
Real Name: Inaplicable
Also Known As: The Entity, That Which Shall Survive, Charles Xavier, Magneto
Place Of Birth: Inaplicable
First Appearance: X-Men Vol.2 #53 (1996) Modern Age Villain
Known Associates: Post, Fatale, Dark Beast, Holocaust, Ms. Steed
Group Affiliation: None
Base Of Operations: Worldwide
Grudges: X-Men
Creators: Scott Lobdell, Mark Waid and Andy Kubert
Onslaught possesses the full might of Prof. X's mind, one of the most, if not the most, powerful telepaths in the world. Onslaught apparently also shares, to a lesser extent, the powers of Magneto-able to manipulate the electro-magnetic spectrum. The full extent of Onslaught's powers appears greater than his separate components as he was able to create and modify such "lieutenants" as the Blob and Post, and was able to revive and alter the Mimic. Eventually, he absorbed the reality-altering powers of Franklin Richards and the nigh-omnipotent mental powers of Nate Grey, As a being of pure psionic energy, only specifically shielded attackers could withstand his attacks, and only specific attacks could hurt him.
When Professor Charles Xavier, after an intense battle with his archenemy, Magneto, reached into his enemy's mind to "shut it off," a portion of Magento's mind similarly entered Professor X's. This essence remained dormant, but soon combined with the Professor's repressed "dark side" to create a separate personality that later called itself "Onslaught."