Gifted superhuman powers by cosmic rays bombarding his body. Mister Fantastic represents the element of water.
Hyper-Intelligence: Mister Fantastic’s natural mental abilities were greatly augmented by the Cosmic Rays that gave him his powers.
Plasticity: Mister Fantastic possesses the ability to convert the mass of his entire body into a highly malleable state at will. How his body's respiration and circulatory systems function at these distorted extremes is as yet unknown. Mister Fantastic can alter his form in a matter of seconds, often much less (depending on the complexity of the shape), and revert to his normal humanoid shape within a similar time. The greater the distance he stretches or the more extended the size of the object he becomes, the weaker his overall strength becomes. Mister Fantastic's transformation to a malleable state is reflexive and nearly instantaneous: if he was at his normal form and taken unaware by machine gun fire, his body would still absorb the bullets' impact through radical deformation. Mister Fantastic's skin is virtually impervious to laceration or punctures unless he willfully relaxes his reflexive control over small areas of his body. In that case, scalpels and ordinary needles can penetrate his skin.
Dense Flesh: Due to the great malleability and elasticity of his molecular structure, Mister Fantastic is able to absorb the impact of any type of man-made ballistic projectile by deforming his body along the path of the projectile's trajectory at the point of initial impact.
Contain Explosions: Mister Fantastic may use his elastic form to contain explosions by enveloping them and allowing their force to expand him. He can enclose and absorb the energy of a large explosive, on the order of 8 to 12 pounds of TNT (excluding exotic, high density explosives). Such shocks to his system are physically exhausting.
Redirect Projectiles: After his body absorbs the kinetic energy of a ballistic projectile's impact, Mister Fantastic can expel the object back along its trajectory by flexing his body like a trampoline if he is adequately braced.
Elongation: Mister Fantastic can extend his limbs, torso, or neck to great distances: the maximum length he can distend before his body segments become painful is about 1,500 feet. (Although he can extend discrete body parts, such as a single finger, an ear, or an eye, he seldom if ever isolates such parts in his elongations.)
Grappling: Mister Fantastic may restrain opponents very efficiently by using his elastic form to entangle them.
Movement: Mister Fantastic can move at great speeds by stretching to his destination.
Shape Changing: Mister Fantastic can stretch, deform, expand, or compress his entire body or parts thereof into any contiguous shape he can imagine for a variety of uses:
Imitation: Mister Fantastic may alter his basic physical features, allowing him to take on the appearance of any other man with similar hair and skin tone. One time, Mister Fantastic actually increased his size and mass density, in effect bulking his body to "Thing"-like proportions while increasing his strength to the same levels as well.
Canopy, Parachute or Sheath: Mister Fantastic can extend his body in two directions, creating a canopy, parachute, or sheath, its thickness determined by the extent of its distention.
Gliding: Mister Fantastic can transform himself into aerodynamic shapes such as parachutes or hang-gliders. In this form he can support an additional 1000 pounds (enough to hold the rest of Fantastic Four).
Cushion: Mister Fantastic may form his elastic form into a trampoline and other cushion-like objects, allowing him to safely catch falling people and objects.
Sling Shot: Mister Fantastic may use his elastic form as a slingshot to hurl objects with great force.
Geometric Shapes: Mister Fantastic has compressed his body into the shape of a solid sphere, a cylinder, a cube, a toroid, and a rectangular prism: he can assume the shape of any solid that he can envision clearly, of a volume no greater than 1.7 cubic feet (a sphere about 18 inches in diameter). He can generate thin-walled shapes that enclose great volumes of space.
Fist Weapons: Mister Fantastic may form his fists into large hammers, maces…etc, which improve his physical effectiveness in hand-to-hand combat.
Bouncing Ball: Mister Fantastic can transform himself into any of a number of resilient shapes, such as balls or springs that allow him to leap or bounce great distances.
Two-Dimensionality: Mister Fantastic can flatten himself to the thickness of an average sheet of typing paper (.0035 inch) or narrow himself to a diameter small enough to pass through the eye of a #10 beading needle (about .045 x .06 inches).
Infiltration: Mister Fantastic can lower his body’s cohesion to such an extent that he can actually flow through minute openings.
Open Locks: Mister Fantastic may form his fingers into various types of keys, allowing him to open most forms of mechanical locks.
Wind Generation: Mister Fantastic may form his hands into fans, allowing him to generate wind by twirling them at great speeds.
Semi-Solid Liquid State: Mister Fantastic can willfully reduce his body into an almost liquid state in order to flow out of small cracks or passages, even through needle-sized holes.
Scientific Genius-Level Intellect: Dr. Richards is one of the most intelligent beings on the planet. Reed possesses a mastery of electrical, mechanical and aerospace engineering, electronics, chemistry, all levels of physics, and human and alien biology. A visionary theoretician and inspired machine smith, he has made breakthroughs in such varied fields as space travel, time travel, extra-dimensional travel, biochemistry, robotics, computers, synthetic polymers, communications, mutations, transportation, holography, energy generation, spectral analysis and more. He is one of the few people on Earth to be an expert on other dimensions and the methods by which to travel to and through them. Reed’s patents are so valuable that he is able to bankroll the Fantastic Four, Inc., without any undue financial stress. Not only has Reed proven himself to be a genius in virtually every science native to Earth, he has shown himself to be more knowledgeable than even some of the most highly advanced alien civilizations in the known universe as well.
Hypnotism: Mister Fantastic is trained in hypnosis.
Mister Fantastic possesses the normal human strength and build of a man of his age, height, and build who engages in moderate exercise, but thanks to his malleable body, he can mold himself into stronger, more attack-based forms.
Although the Fantastic Four have numerous devices, crafts, and weapons, there are some items that Reed Richards carries with him at all times.
Fantasti-Flare: Launches a fiery "4" into the sky that is used during combat situations to let other members of the group know their location.
Fantastic Costume: Like all the Fantastic Four's costumes and the rest of Reed's wardrobe, his suit is made of "unstable molecules". This means that the suit is attuned to his powers, which is why Johnny's costume doesn't burn when he "flames on," Sue's costume turns invisible when she does, and Reed's costume stretches with him. The costume also insulates them from electrical assaults. In addition, the team's uniforms are also, in essence, wearable computers. Their costumes have a complete data processing and telemetry system woven into the material of the uniform on a molecular level. This forms a network with the entire team, providing a constant, real-time uplink of everyone's physical condition as well as their location and current situation. The suit is capable of displaying data and touch-pad controls on the gauntlets. Its sensors can track all of the team's uniforms and provide a picture of their immediate vicinity. The suit has an intricate scanner system which can detect things around the wearer, from how many people are in the next room to what dimension or planet they are on. Reed can also up-link the bodysuit to any computer by stretching his fingertips to filament size and plugging them in to an I/O data-port. With this, Reed can establish a fairly comprehensive database of any computer's cybernetic protocols and encryption algorithms.