Tenebrous of Darkness is a an entity of great power. Tenebrous' power stems from a force called the Crunch. Tenebrous was one of the Proemial Gods and existed when this universe was very young. Along with Aegis, the Lady of All Sorrows, he destroyed all of the Chaos Mites that were created by Diableri of Chaos. Tenebrous was one of few Proemial Gods to be very loyal to Diableri's cause of remaking the universe in his own image. This battle eventually brought them to Galactus. Tenebrous and Aegis were the only Proemial Gods that survived this battle and they were both imprisoned by Galactus at the edge of the universe. They remained there for centuries until the Annihilation wave destroyed the prison, freeing them and other prisoners of Galactus including Fallen One, Galactus's first herald, and Kosmos the Maker, also known as the Beyonder. Tenebrous began draining the strength of Fallen One and this newfound strength he and Aegis confronted and easily defeated Galactus and Silver Surfer. Thanos arrived with a Chaos Mite on his shoulder who would not reveal how she survived all this time to Aegis and Tenebrous. Thanos began to drain to cosmic powers from Galactus and Silver Surfer. Some time later Tenebrous and Aegis returned to their old prison in hopes of finding other surviving Proemial Gods. All they could find was the body of Antiphon the Overseer. By this time the Silver Surfer and Galactus had escaped from Thanos and Silver Surfer found Tenebrous and Aegis at the ruins of the prison. Galactus soon arrived only to witness the Silver Surfer's impossible victory over both Tenebrous and Aegis. This marked the end of the last Proemial Gods.