On a trip deep in Africa, missionary William Matthews stumbled on a being of incomprehensible power lying dormant. Irradiated by the being's powers, Matthews was driven mad, filled with visions of the multiverse, and imbued with a sense of purpose. Matthews took on the being's name of Gog, and embarked on a trip through space and time.
As one of the most prolific time travellers in DC, the exact order of his journey is unclear, as is his precise origin. In each of Gog's stories he claims a different origin, and yet we are shown that Gog was driven mad by the sight of his God. There may have been three Gogs, there may have been one, all we know is that they are all William Matthews. As such, his feats will be used in a composite manner in regards to all three of his pre-flashpoint appearances, with focus on his most powerful and significant incarnation, his appearance in "The Kingdom". What we do know is that Matthews grew into a being of incredible strength, killing Superman hundreds of times, and sweeping through the Justice Leagues of multiple universes.
Casually tanks the destruction of Krypton without a scratch.
Easily reacts to a Bullrush from Wonder Woman from Behind
Casually reacts to and shoots Kingdom Come Flash, stating that Flash's speed doesn't make him any harder to tag because he could see the electrons forming in front of him.
Claims to be faster than Superman before whacking him out of the air
Laughs off the effort of several heroes
Easily shatters one of Kingdom Come Alan Scott's Constructs that was amped by Nabu's Magic
Tanks the Phantom Zone Projector at Point Blank range and only loses some skin on his arm
Easily reacts to a Time-Traveler that was stepping between nanoseconds
Tanks the Combined assault of Dozens of Heroes while they were amped by Several Cosmic Artifacts.
Tanks Wonder Woman's Sword to his chest and snaps it like a twig
Tanks a Point Blank Blast from Magog
Gains the Upperhand against Infinity Man
Goes toe to toe against the combined efforts of the Kingdom Come JLA + Kingdom Come JSA
Power of Gog's Staff:
Gog's Staff is empowered by the combined power of the Guardians, The Source, Zeus, and Shazam. The Quintessence poured all they had into Gog's weapon, and now its powers surpass even their own.
The Staff vaporizes Kingdom Come Superman in a single blast
Uses the Staff to Torture Captain Atom and render him unconscious
The Staff One-Shots Hercules
The Staff breaches through the Walls of Hypertime itself
The Staff Releases an AOE that Ragdolls several heroes
The Staff Annihilates Several Amazons
The Staff One-shot kills Old God Gog
The Staff Severely Cripples an Off-guard Mxy.
Here, he absorbs the combined attack power of several Kingdom Come powerhouses including Dr. Fate, Zatanna, Hal Jordan, Obsidian and many others, totally unaffected and just grows many times in size. Thus, energy projection and magic attacks are legitimate liabilities to use on him.
Mentions how that with each Superman he killed he absorbed some of their power which is a trick he "bled" out of Amazo.
Turns every cell of Kingdom Come Superman's body into living Kryptonite.
Teleports behind Superman and stabs him in the back
Teleports Several heroes back to Congo
Has the ability to Travel through Hypertime itself
Travels through time every single day just to kill Superman
Anomaly in the Space-Time Continuum
After developing extremely advanced time-travel technology, Gog proceeds to arm his entire timeline. Thus, there are an infinite number of instants featuring a Gog. He develops the technology to bring them all into the present together.
Gog rips open Hypertime itself, and an endless stream of Gogs pours out, all as powerful as the original. With them, he single-handedly wages war for a hundred years against The most evolved version of Doomsday and the League of Superman since he never runs out of men, but loses on purpose since he becomes bored and complacent.