Onslaught's powers and abilities
Onslaught possessed all of the mutant abilities of his progenitors Professor X and Magneto. He later added the powers of Franklin Richards and Nate Grey to his, making him even more powerful. He was ultimately contained because of the Franklin's intervention to spare the heroes, what broke Onslaught's control. Franklin stated that "Xavier told me to fight Onslaught" and asked Nate for help. Onslaught was presumably restrained by Xavier's influence so that without Xavier's restrictions he could use his power to the fullest, thus acquiring "freedom".
Astral Plane Tap
Ability to Tap into the enormous psychic resources of the astral plane in order to manipulate matter and energy.
Astral Travel
Capable of forging psi-links to travel in astral form.
Material Astral Projection
Give substance to astral energy to solidify psychic forms or forge protective psi-armor and even pull the astral projections of other telepaths into the physical world.
Psychometry
Can read residual thought imprints left on objects touched by people.
Dimensional Sense
Capable of sensing dimensional rifts or anomalies.
Telepathy
Onslaught is able to read minds and project his own thoughts into the minds of others in vast distances from him with little to no resistance from even the most powerful telepaths.
Telepathic Illusion
Ability to create realistic telepathic illusions and cause people to experience events which are not actually occurring.
Telepathic Camouflage
Ability to mask himself, and other peoples' presence from those around him. Can telepathically disguise himself, making his appearance to those around him quite different (changing the appearance of clothing, as well as more involved disguises).
Mind Blast
Ability to place large amounts of information in another mind.
Mind Control
Ability to control the minds of others upon mere concentration. This power can allow him to completely shut down several peoples' minds, making it appear as if time has stopped. His telepathic control was so powerful that he was one of the only few to completely control Hulk (albeit in a calm state), despite the green goliath's immense resistance to psychic control[10].
Mind Possession
Ability to possess the mind of another, and use that being's body as his own.
Mind Alteration
Ability to alter the minds of others by force of will.
Mental Amnesia
Ability to cause loss of particular memories, and amnesia in another person or even in a group of people. Powerful enough to make a person have total mental paralysis.
Psionic Shield
Ability to erect a psychic shield for protection of himself and of others minds and is sufficient to protect himself from other psychics on the Omega-level.
Psionic Blasts
Can project psionic force bolts which have no physical effects but which can affect a victim's mind so as to cause the victim pain or unconsciousness and can even kill an adversary. Even without being fully evolved, his psionic blasts affected Juggernaut even though Juggernaut was wearing his helmet which had protected him from very powerful psychics, slowing him down enough for him to hit Juggernaut.
Astral Projection
Ability to Astral Travel and communicate with others astrally through his own will, or through contact with the thoughts and memories of others. In the astral realm, he can use his powers to create "ectoplasmic" objects. He cannot engage in long range astral projection on the earthly plane.
Mental Detection
Can sense the presence of another superhuman mutant within a small but as yet undefined radius of himself by perceiving the distinctive mental radiations emitted by such a being.
Telekinesis
Telekinetically, Onslaught is capable of very fine control over objects; he can disassemble complex devices explosively (separating every last component, such as screws, nuts, circuit boards, etc.), and just as quickly and easily assemble complex devices. This also has enabled him to even attain awareness and control over objects as small as individual electrons in an atom. For instance, Onslaught could detect if a seal was hermetic, or not, by checking for the presence of penetrating oxygen molecules. He could even detect and discern individual oxygen molecules, and determine the atomic weight of molecules, by the amount of atoms present. On larger levels, Onslaught can levitate great weights, into the tons, but his upper limit has remained undisclosed.
Psionic Spikes
Ability to create destructive psionic spikes that destroy the physical objects that the spikes come into contact with.
Force-Fields
Ability to create protective force shields that could deflect even the most powerful of attacks (even filter bacteria from the air). The upper limits of this ability remain unknown, but it is believed that he could probably protect himself from harm at the ground zero detonation of a 1 kiloton nuclear warhead (4.18 terajoules of energy from the heat, concussion, and radiation effects) with ease. Onslaught has also displayed such control over the fields as to shape them precisely, even to conform very closely to his body?s form. There does not appear to be any correlation between field strength and the thickness of the telekinetic fields.
Concussive Blasts
Can project his telekinetic energies as powerful blast beams directed from his brain that could apparently affect matter with concussive force.
Flight
By levitating himself, he can fly at incredible speeds.
Intangibility
Can phase through solid matter by mentally shifting his molecules around another object's as he moves forward.
Telekinetic Holograms
His mental fine motor skills are so acute that he can mentally manipulate dust particles and water vapor to refract light-waves and create holograms.
Electromagnetic Spectrum Manipulation
Onslaught has some ability to project or manipulate any form of energy that is related to the electromagnetic spectrum. He can fire and absorb bolts of electricity and magnetic force, reverse lasers and other forms of radiation or energy, create enough intense heat as infrared radiation to level a city, and become invisible by deflecting visible light around his body. Heat or infrared radiation, is part of the electromagnetic spectrum, which also includes visible light, radio waves, ultraviolet light, gamma rays, and x-rays. Onslaught can project any of these. Onslaught can maintain total control of an entire planet's electromagnetic field and can manipulate it accordingly. He has also dispersed a "flame cage" created by the Human Torch, but whether he had simply expanded his personal force field or employed something else entirely is unclear. Onslaught once used his powers to create a stable wormhole between two points in space.
Electromagnetic Sight
Onslaught can perceive the world around himself as patterns of magnetic and electrical energy. He can perceive the natural magnetic auras surrounding living beings.
Electromagnetic Pulses
He also has creative uses of his powers such as using his telekinesis to channel the Earth's magnetic field through the electro-current of his brain and generate devastating electromagnetic pulses.
Magnetokinesis
Onslaught has the power to shape and manipulate magnetic fields that exist naturally or artificially. He can draw magnetic force from outside himself, or can also generate magnetic force within himself. Onslaught's power is psionic and physiological in nature. He can lift, move, and alter objects. Onslaught can project metal at an unparalleled velocity and place tremendous pressure on metallic substances to liquefy and reshape them, manipulate the iron-enriched blood-flow to one's brain to induce aneurysms or unconsciousness, redirect the flow of blood through one's brain to alter thoughts and perceptions or blank a person's mind completely, levitate a person or control a person's actions by manipulating the iron in their bloodstream, remove the iron from the bloodstream entirely through a person's skin, control ferrous particles in the atmosphere, alter the Earth's magnetic field which extends into space as the magnetosphere, prodigiously increase his own strength to superhuman levels, and achieve a wide range of other effects.
Magnetic Force-Fields
Onslaught usually protects himself with a personal force field that he can quickly expand to protect large areas. His force field has withstood the effects of multiple nuclear weapons, volcanic eruption, the depths of space and attacks from multiple Avengers or X-Men, including Phoenix, Thor, and even Galactus.
Organic Iron Manipulation
Onslaught can control the iron within any organic matter which allows him to have full control over an opponent's body. Onslaught has also demonstrated the ability to control the blood flow within one's body thus causing them to die a painful or even quick death.
Superhuman Strength
Onslaught possesses vast superhuman strength of unknown limits. Onslaught can lift well in excess of 100 tons easily without using his psionic, magnetic, telekinetic or reality altering powers to increase his strength. While using those powers to enhance his strength, the upper limits of Onslaught's strength are unimaginable. While not fully evolved physically, he demonstrated sufficient strength to overpower a fully powered Juggernaut and punched him with enough force to render him unconscious and send him flying from Canada to New Jersey with just a single blow. He later used his claws to easily skewer the Juggernaut and rip out his Cyttorak gem from his body.
Impervious Armor
After complete physical evolution, Onslaught?s armor is nigh-invulnerable and near impossible to crack. The only exceptions were blows from an enraged Banner-less Hulk. However, some were capable to cause damage when Onslaught was in an unstable vulnerable mid-evolution flux. Finally, Onslaught used the Hulk's phenomenal strength to destroy his armor so that he could fully evolve. Hence it presumably means that he could not evolve by himself and the Hulk needed to overcome his powers.
Telepathic Immunity
His mind is immune to all traces of telepathy, due to his armor, his mind cannot be manipulated nor can it be read. Although, his telepathy is capable of exiting his armor, allowing his telepathy to be used on others.
Mutant Absorption
As a psychic entity, Onslaught had the ability to absorb any mutant into his being and thus permanently gain their powers for himself. X-Man and Franklin Richards were two mutants that he consumed to further his vast power.
Reality Manipulation
Ability to manipulate reality itself. Reality warping powers on a potentially cosmic scale. His abilities are so powerful that he can create "pocket" universes in alternate realities (A pocket universe is a cosmos that does not equal our own in size). Utilizing this power he was able to effectively create a second sun from nothing, something only high level cosmic entities have been able to perform.
Abilities
Genius-level Intellect
Onslaught possesses the combined genius intellects of both Charles Xavier and Magneto, granting him the same expertise and knowledge of each. With his super-genius intellect he could master his powers better than inexperienced wielders, like the reality manipulator Freedom Ring or the infant Franklin Richards.
Formidable hand-to-hand combatant
Onslaught is also possessing the knowledge of combat both Xavier and Magneto have learned over the years.
Strategist
Onslaught is particularly adept at using all of his powers in combat situations, typically preferring to combine certain aspects of different abilities for different situations. He is a skilled manipulator with and without his powers. He has tricked his enemies into doing exactly what he wished to do multiple times.
