Atrocitus

Atrocitus was the leader of the Red Lantern Corps.

History
In 150,082 CMT, User MY applied the characteristics of each known Power Ring to a prototype Platinum Lantern Ring in an attempt to create the ultimate ring for his planned Platinum Lantern Corps. However, User MY found that the characteristics of most of the Power Rings were incompatible with each other and were impossible to imbue in the same ring, with one exception: the Red Lantern Ring's ability to replace its wielder's heart and make them utterly subservient to a higher cause. The result of this experiment was a Power Ring that enslaved its wielder but had no added effects other than the basic ability to forge constructs. User MY was unhappy with the result because he did not want the Platinum Lantern Corps to be like "the horrible monstrosities that Atrocitus commands", so he decided to modify the design and add another ability that would make the Platinum Lantern Ring worth wielding.