Emerald Eclipse

Mongul has taken over the Sinestro Corps and makes the planet Daxam its new home. Sodam Yat, the Daxamite Green Lantern who carries the power of Ion, has to go back to the homeworld he swore he'd never return to.

Meanwhile, on Oa, a Red Lantern breaks out of the sciencells and starts a riot that Kyle Rayner, Guy Gardner and Kilowog have to contain. It's the last Green Lantern Corps arc before Blackest Night.