John Constantine first appeared in The Saga of Swamp Thing #37 (June 1985) and was created by Alan Moore, Stephen R. Bissette, Rick Veitch and John Totleben. In DC Universe Online, he is voiced by Shannon McCormick.
John Constantine appears in various content, such as:
1. He guides the player (Both factions) through the Artifact on duty mission at level 23.
2. He is a vendor in both Watch Tower and The Hall of Doom, and he's selling artifacts and catalysts for source marks.
3. John Constantine gives a daily mission (5 total) in Gotham wastelands' Heroes Garrison.
4. For Villains, he is a random boss in the Desecrated Cathedral duo.
5. He is opening the missions for players in Justice League Dark's open world "Chaos Gotham".
6. He and Zatanna aids players in the Pub Crawl duo.
7. Players team up with John Constantine in Darkness Rising Alert in Justice League Dark.
8. John and other magical heroes needs to be saved with the help of Zatanna and the heroes\villains during the Fellowship of the Arcane raid.
9. In Shattered Gotham, John Constantine prevents Shazam from getting all the power the other magical heroes gave him, and he aids the heroes during the entire duration of the raid.
10. He got a new model with the launch of Justice League Dark.
Inspired Items:
1. Enhanced and Regular John Constantine Emblem.
2. Con Job Hairstyle.