10 Most Powerful Characters Killed By Hal Jordan's Green Lantern

10. Multiple Sinestro Corps Members - Sinestro Corps War

One of the most impactful events in Green Lantern lore, the Sinestro Corps War permanently changed the face of DC's cosmic realm and pushed the otherworldly heroes to their limits in ways not seen since the Emerald Knights arc. The event depicts the titular villain amassing a massive army to unleash chaos across the universe and enact revenge on the Green Lantern Corps.

Despite the wilpower-fueled team recently losing its weakness to the colour yellow, they were woefully unprepared for the Sinestro Corps' reign of terror and the lethal brutality of its members. Because of these devastating challenges, the Guardians were forced to make amendments to its rules, chiefly its stance on Lanterns and the use of lethal force.

Once the Green Lanterns' no-kill rule was lifted, Hal and his allies butchered many of Sinestro's soldiers in a vicious intergalactic clash which ultimately claimed the lives of 440 Green Lanterns.