Indigo Tribe

Centuries ago, violent explorers came to the planet Nok and transformed it into a slave center. They built dungeons to hold the indigenous people before transporting them across the universe to fates unknown. When Abin Sur—one of the greatest Green Lanterns of all time—arrived on Nok, he allied with one of the remaining natives, Natromo, and fought against the invaders.

Together, Abin Sur and Natromo discovered the power of the Indigo light. It stemmed from a spring within a cavern in the deep jungles, from an unknown source deep within the world of Nok. The original inhabitants used its heat to forge their weapons. They soon learned that once their enemies were cut with these weapons, they momentarily changed. For a brief time, they were overcome with remorse. Though the rest of the indigenous people returned to the jungles after they were freed, Natromo stayed to teach Abin Sur the ways of the Indigo light.

They became allies and friends. Together they forged an Indigo ring, then Abin Sur left. In time he returned with a woman known as Iroque. Iroque was the first to wear an Indigo ring. It changed her. It filled her heart with compassion. He then set off to bring back others while Natromo forged more rings.

The tribe is made up of the worst killers and sadists the universe has ever seen, brought to Nok by Abin. The Tribe was to be an army at the ready for Abin Sur, but the true reason behind the forging of the rings had nothing to do with the redemption of his enemies. Following the prophecy of the Blackest Night, Abin Sur knew once it had passed the end of the Green Lantern Corps would be at hand. He knew it would be destroyed by an evil hidden from sight, an evil from within. That evil being the Guardians of the Universe. The dead Abin Sur knew the Guardians were unbeatable, so he made a plan to change them. The Indigo Tribe was simply a test. The rings were the only way to stop the Guardians' impending madness.