In the early 1990s, DC retconned Eclipso in a company-wide crossover built around the miniseries "Eclipso: The Darkness Within". Eclipso was revealed not simply to be Bruce Gordon's dark half, but a vengeance demon who had possessed Gordon. Eclipso's soul had originally been bound inside a giant black diamond called the "Heart of Darkness" in Africa. A treasure hunter found it in the late 19th century and brought it to London in 1891, where he had a jeweler cut it into 1,000 shards. This weakened the binding spell, allowing Eclipso to possess anyone who became angry while in contact with one of the shards. He was no longer limited to possessing Gordon during an eclipse, but pretended otherwise so that Gordon would not know the truth about the black diamonds.