| Unofficial Justice League Dark Index |
Credits:
| Story | Jeff Lemire |
| Art | Mikel Janín |
| Lettering | Rob Leigh |
| Colors | Ulises Arreola |
| Associate editing | Katie Kubert |
| Editing | Brian Cunningham |
Feature Character(s):
- Justice League Dark
- John Constantine (also in flashback in between Justice League Dark #0 and flashback in Justice League Dark #11; next in Justice League Dark #13)
- Deadman (next in Justice League Dark #13)
- Zatanna (also in flashback in between Justice League Dark #0 and flashback in Justice League Dark #11; next in Justice League Dark #13)
- Madame Xanadu (next in Justice League Dark #13)
- Black Orchid (next in Justice League Dark #13)
Guest Star(s):
- Tim Hunter (also in flashback in between flashback and main story in Justice League Dark #11; next in Justice League Dark #13)
- Doctor Occult (dies)
Supporting Character(s):
- Steve Trevor
- House of Mystery (in between Justice League Dark #10 and Justice League Dark #13)
- House of Secrets (next in Justice League Dark #13)
Villain(s):
- Nick Necro (Nicolas Edgar Nolan; first appearance; last in Justice League Dark #0; next in Justice League Dark #13)
- Felix Faust (next in Justice League Dark #13)
- Doctor Mist (also in flashback preceding flashback in Justice League Dark Annual #1; next in Justice League Dark #13)
- Blackbriar Thorn (next in Justice League Dark #13)
- Black Boris (first appearance; next in Justice League Dark #13)
Guest Appearance(s):
- Baron Winters (in flashback preceding Night Force Vol. 3 #1)
- Sargon (in flashback)
- Zatara (dies in flashback)
- Mento (see Comment)
Other Character(s):
- Mosa (first appearance; Doctor Mist's wife; dies in flashback)
Comment(s):
- Story continued from Justice League Dark #11 and continues in Justice League Dark #13.
- The flashback show the events surrounding Zatara's death as originally shown in Swamp Thing Vol. 2 #50 in the pre-Flashpoint universe, as it happened in the New 52 universe. Mento's appearance is quite different and since he haven't shown up elsewhere at this point it cannot be determined whether or not this is indeed him.