Speed Force

The Speed Force is an energy field that grants all speedsters their power. Several speedsters have merged with it, including Barry Allen, Johnny Quick, and Max Mercury.

The Speed Force is a vaguely defined extra-dimensional energy force that serves as the ultimate measure of velocity in the Universe. It introduced several "new" powers/implications to Flash and other Speed Force-powered persons, with brought it also it's multiple related ability:
 * Infinite mass punch - traveling near the speed of light acquired the relativistic mass of such speed to impart blows which could hit with the force of "a white dwarf star," enabling him to knock down such powerful foes as the White Martians with a single punch. Flash's own durability is regulated by the Speed Force in such cases.
 * Speed lend/steal - Perhaps his most versatile new power. Because the Speed Force governed all motion, Wally could rob objects of their kinetic energy, motion, or momentum (e.g., bullets in flight or turning a supervillain into a statue) and use the energy to accelerate himself even faster.
 * Metabolize wounds - Accelerating his healing factor while using the Speed Force to sustain him, he could heal from grievous injury without prematurely aging like his counterpart from another reality, Walter West. Related to the ability above, Wally would serve as the "team medic," healing other team members by accelerating their healing factors (without prematurely aging them).
 * Constructs - Wally discovered that if he concentrated, the Speed Force could be used to create solid constructs. The first time he used this ability was to create a solid armor enabling him to run despite having broken legs. Later examples included sealing up the openings of his costume against disease, creating pockets for holding things, etc.
 * Shield - Exhibited by Savitar, whose mastery of the Speed Force allowed him to reflect objects away from himself.
 * Flight - Exhibited by Johnny Quick and his daughter, Jesse Quick; the only speedsters known to exhibit this ability. However, all speedsters traveling faster than escape-velocity exhibit "inverse flight".
 * ESP - Exhibited by Max Mercury, whose communion with the Speed Force allows him to detect the motion of any object in the world, and especially to perceive other speedsters. Wally West exhibited a similar ability which allowed him to perceive Linda across time and space due to the strength of their bond.
 * Total recall - Exhibited by Bart Allen, who can retain everything he speed-reads (in contrast to other speedsters, who only retain the information temporarily).
 * Speed scouts - Exhibited by Bart Allen, who can create Speed Force-duplicates of himself that, due to the timeless nature of the Speed Force, can travel forwards and backwards through time. They can also manipulate objects or merge their consciousness with Bart, informing him of their actions. However, after one of his Speed Scouts was killed, Bart was thrown into a coma and hasn't used the ability since.
 * Speed control - Traveling at any speed one believes they can move at.
 * Negate Anti-Life Equation - Not yet explained, but it is seen in Final Crisis #4 when Barry Allen kissed his wife, who was under the control of Anti-Life, and the Speed Force surrounded her and she regained her free will.
 * Muscle growth - Exhibited by Jai West, who has the power to speed up the growth of his muscles, temporarily giving him super strength, but causing him to be exhausted after a short time.
 * Intangibility/Self-molecular control - Exhibited by Barry Allen, Bart Allen, and Iris West. Their total control of kinetic energy at a molecular level allows them to match the vibrational frequency needed to travel easily into and through solid matter. Wally West has this ability, too, but with less control, so solid matter usually explodes when coming in contact with him. When Bart Allen internalized the Speed Force into himself, he too showed difficulty with this ability, melting matter if not concentrating enough. Iris' control is as effortless as Barry's, but unlike his, it is somewhat unstable. As an offensive ability, it can be used to scramble one's molecular structure to the point of literal disintegration.