89. Superman Prime vs. Ion
During the Sinestro Corps War, Daxamite Green Lantern Sodam Yat is given control of Ion, a powerful energy source that the Guardians trust to special Green Lanterns to guard. In return, Ion gives the user powerful energy powers.
Also during the War, Superman Prime made his way back to Earth for the first time since Infinite Crisis, and this time, it is not just the Teen Titans waiting for him, but pretty much every DC hero there is! Their plan was to take him out before the sun comes out, but they were unable to do so, so Sodam Yat shows up to try to stop him.
Their battle is a fierce brawl in Green Lantern Corps #18 by Peter Tomasi and artist Patrick Gleason (Jamal Igle draws some flashbacks during the issue) that leaves Yat, the most powerful Green Lantern of them all - a bloody mess by issue’s end.
Still, he gave a villain who took on the entirety of DC’s superheroes a run for his money!