Children of Cain's Chaos Essence

 is a catalyst which can be used in the process of upgrading the Damaged Chaos Lord's Cloak of Omnipotence available from content in the Justice League Dark episode.

Obtained from

 * JLD: Darkness Rising (European Castle stage)

Trivia

 * Five pieces of Gothic Chaos Essence are needed to breakthrough milestone rank 1 of the Damaged Chaos Lord's Cloak of Omnipotence.