Green Lantern Issue 18 (cover E)

Thaaros has arrived on Oa, hell-bent on destroying everything in his wake, with only Hal Jordan and the other Lanterns to stop him. Meanwhile, Kyle uncovers the secret of the Source Lantern as Varron moves to gain its power for his own. The Green Lantern universe flies toward a new status quo as our heroes contend with the nefarious forces gathered against them!