|Real Name: None
|Also Known As:
|Place Of Birth: Unknown
|First Appearance: House of Secrets 61
|Group Affiliation: Ally of Mordru and Obsidian
|Base Of Operations: Mobile
|Grudges: Green Lantern, JLA and JSA
|Eclipso's powers are at their strongest while he resides on the moon, and he can manifest himself on Earth only at night and only when summoned by a possessor of a black diamond. Eclipso is summoned by feelings of rage and revenge.
|Enhanced Abilities: Eclipso has super human strength and endurance.
|Invulnerability: Eclipso is virtually invulnerable to damage.
|Flight: Eclipso is able to fly.
|Heart of Darkness Diamonds: When Eclipso holds one of these black diamonds to his eclipsed eye, it projects a chilling beam of black light that forms an impenetrable field. When held to his normal eye it fires powerful laser beams.
|Eclipso is the God of Vengeance, stripped of most of his power and banished from Earth some time in the distant past. This was accomplished by magically transforming Eclipso's physical essence into the Heart of Darkness, a huge black diamond, which was then hidden in a tomb in the Upper Congo. In 1891 a thief stole the gem and took it to London, where a jeweller cut it into one thousand identical pieces. The smaller gems were sold individually, and scattered across the globe. Meanwhile, Eclipso's consciousness had been residing on the dark side of the moon, in a palace he built for himself at the bottom of a deep crater. The fractioning of the Heart of Darkness weakened the spell that banished him from Earth, and he gained the ability to possess those on Earth who inadvertently summoned him.