[2] Klarion appears in the 2000 event Young Justice: Sins of Youth, in which he is involved in a plot by the Agenda to turn the public against the metahuman community, targeting juvenile super-heroes as the weakest link in the chain.

In these issues, he expresses loneliness after turning various villains into children during the "Sins of Youth" storyline and wishes for a playmate of his own age before eventually befriending Ariella Kent, the Supergirl of the 853rd century.

[3] The new version of Klarion is an inhabitant of Limbo Town, an underground community beneath New York City whose citizens are descended from Puritan witches and the Sheeda-King Mr. Melmoth.

[4] In Countdown to Final Crisis, Klarion encounters Mary Marvel, who has recently been given Black Adam's powers and is struggling to control them.

An extremely powerful and talented warlock, Klarion is considered one of the most dangerous magic users in creation despite his appearance and temperament.

[1] He has a plethora of knowledge of various magic and spells, affording him nearly limitless abilities such as being able to transform himself, travel into other dimensions, energy projection, shapeshifting, telekinesis, etc.