Darkseid gets his power from an energy called the Omega Effect. This energy allows him to emit Omega Beams, which are powerful bio-electric energy beams that can track and disintegrate a selected target. Both Darkseid and his son Grayven possess the ability to generate Omega Beams, though Grayven's Omega powers are inferior to those of his father. Darkseid once boasted that no living being had ever withstood the full force of the Omega Effect, but Doomsday and Superman have both withstood the Effect. The Cyborg Superman has demonstrated a degree of resiliency to them as well. While capable of passing through almost any substance, the Beams are ineffective against the bracelets of Wonder Woman, which were forged from the Olympian Aegis.
Another ability granted by the Omega Effect is the Omega Sanction, the Death that is Life, also known as "The Life Trap. The Omega Sanction, when inflicted on an individual, traps them in an endless succession of synthetic lives, each one more degrading and hopeless than the last. Darkseid has been known to have used this on Batman and Shilo Norman.
The effects of Darkseid's Omega beams in the new DC continuity have yet to change, it still maintains its more lethal processes of hideous atomic dissociation, trajectory arcing and phase shifting on a whim. Uxas even found a way to impart an offshot variation of his terrible power unto a clone of Superman he had created to aid him in his conquest and assimilation of Earth 2. His wayward daughter born to the evil Amazon Myrina Black inherited her fathers power but the extent of her ability to use it, while remaining to be seen, are nonetheless impressive seemingly accomplishing what even Darkseid could not when she shattered Wonder Woman's Bracelets of Submission in one shot. After Darkseid's death, Luthor temporarily took up the mantle as leader of Apokolips and obtained control of the Omega Effect.
Links and References