Quentin has been described as an Omega Level Mutant and Omega Level Telepath/Telekinetic as well as a Psionic of Highest Order. Quentin has been described one of the most powerful telepaths, telekinetics and psions, vastly surpassing the abilities of all known telepaths, with the exception of Jean Grey. Therefore his abilities are almost unmatched. He also was also an avatar of the Phoenix Force, and his future self was shown to be the eventual host of the Phoenix Force.
For a time, due to his Secondary Mutation, Quentin had evolved into a non-corporeal life-form existing as a disembodied consciousness as his brain cells turned into faster than light energy that was in connection with every sentient being on the planet.Since he was freed from his container by Kade Kilgore, he stood in his physical form, finding his non-corporal one boring, and doesn't seem able to use the full-range of his abilities. He hasn't manifested these specific qualities since.
Telepathy: Quentin is an Omega-Level telepath capable of using deep and subtle influence. Also capable of displaying various psionic feats with the minds of others including reading and communicating with thoughts over vast distances.
Mental Manipulation: He has the ability to subtly use deep influence upon multiple people, allowing him to manipulate their perceptions, better judgement, wills and common sense.
Telepathic Tracking: He has enhanced psionic senses enable him to detect and track other sentient beings by their unique psionic emanations (thought patterns contained in the psionic portion of the spectrum) especially if they pose a threat to his well-being in his immediate vicinity.
Telepathic Cloak: Can mask his presence from being detected by others. His abilities can at times go undetected or be counteracted by other more powerful telepaths depending on their level of skill in using their own psi abilities. He can extend these defenses to others around him as well.
Mind Control: Quentin is capable of controlling the minds of others assuming they are within his physical presence.
Telepathic Illusions: He has the ability to create illusions to make himself seem to be invisible, look like someone else, or make others experience events that are not truly happening.
Mental Paralysis: Quentin has the ability to induce temporary mental or physical paralysis
Mental Amnesia: He can erase any awareness of particular memories or cause total amnesia.
Psionic Blasts: Quentin 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.
Absorb Information: He has the ability to quickly process, learn and store information via mental transference.
Psychic "Construct": Through sheer effort and concentration, Quentin may create a large "world" within his mind, complete with AI Driven scenarios and thousands of NPCs(non-playing characters; people controlled by AI), each with their own back story being ran simultaneously. By pulling people into the world, they'll enter a comatose-like state and should they posses one, will be taken over by a secondary personality, as was the case for Wolverine. The AI will feed off of the memories of anyone in the video-game-like world, making some things even unfamiliar to Quentin himself. After keeping the world formed for several days, he lost control due to his already disturbed psyche and no longer retained complete control over the world.
Astral Projection: He can project his astral form from his body onto astral planes or the physical planes. In the physical plane he can only travel in astral form over short distances. In the astral plane, he can mentally create psionic objects and manipulate the aspects of his environment.
Psionic Shotgun: Quentin recently learned to channel his mental energy as an astral energy shotgun construct which manifests the focused totality of his telepathic powers. A power he seemed to effortlessly manifest once he heard Elizabeth Braddock did the same with her psi-blade. Much as Psylocke's psi-blade it doesn't cause any external affects but deals direct mental damage leading to intense pain, unconsciousness or possibly death.
Psionic Rocket Launcher: Quentin displayed a brief demonstration of his using his psionic powers to construct a rocket launcher.
Telekinesis: Quentin is an Omega Level Telekinetic, and can manipulate objects and others at will, and project psychokinetic bolts. Quentin's telekinetic abilities are extremely powerful however, the uppermost limit of his telekinetic strength has yet to be seen. Quentin is also capable of ultra-fine tuned usage of it, being able to sense and manipulate matter and energy, even on a sub-atomic level, as he was able to re-integrate his own body and most of that of a decaying Sophie. However, his telekinetic abilities rival those of the most powerful villains and heroes such as Psylocke, Vulcan, Apocalypse etc.
Flight: Quentin is able to levitate himself to fly at supersonic speeds.
Force Field: Quentin is able generate impenetrable potent force fields around himself and others.
Tactile Telekinesis: Quentin is able to completely surround himself in a compact personal force field of telekinetic energy, protecting him from harm and physical damage such as bullets, energy blasts, etc.
Psychic Intelligence: He possesses advanced cognitive and mental abilities allowing him to organize and construct his thoughts at accelerated rates, process data at high speeds, construct and formulate his thoughts with vast quantity and quality, project ideas and impressions into the minds of others, intuitively disable existing psychic phenomena and barriers that even other Omega level types such as Rachel Summers could not, and naturally shield him from psychic assaults. He thinks ten million brilliant thoughts per second.
Psionic-Energy Mimicry (possibly): When Quentin was in the process of dying due to a combination of using the mutant enhancing drug kick, and a powerful psychic blast from the Stepford Cuckoos caused his mutation to evolve rapidly and saved his life, transforming into a non-corporeal life-form existing as a disembodied consciousness, made out of a form of psionic energy. He had some trouble at first holding this form when got to tired or worn out, but so far he is able to hold this form without trouble.