| Unofficial Adventure Comics Index |
Credits:
| Story | Jim Shooter |
| Layout pencils | Jim Shooter |
| Pencils | Curt Swan |
| Inks | Jack Abel |
| Lettering | Joe Letterese, Ben Oda |
| Assistant editing | E. Nelson Bridwell |
| Editing | Mort Weisinger |
Feature Character(s):
- Legion of Super-Heroes
- Dream Girl (next in issue #374)
- Duo Damsel (creates the identity Marie Elkins while in Smallville; next in issue #372)
- Invisible Kid (next in flashback in Legion of Super-Heroes Vol. 3 #59)
- Mon-El (reuses the identity Bob Cobb while in Smallville; next in flashback in Legion of Super-Heroes Vol. 3 #59)
- Princess Projectra (next in issue #373)
- Shadow Lass (creates the identity Betsy Norcross while in Smallville; next in issue #374)
- Superboy (last in Superboy Vol. 1 #149)
- Ultra Boy (next in flashback in Legion of Super-Heroes Vol. 3 #59)
Supporting Character(s):
- Lana Lang (also as Insect Queen; next in Superboy Vol. 1 #149)
- Jonathan Kent (next in Superboy Vol. 1 #150)
- Martha Kent (next in Superboy Vol. 1 #150)
- Pete Ross (in between Superboy Vol. 1 #135 and #160)
- Chief Parker (next in Superboy Vol. 1 #160)
- White Witch (last in issue #351; next in Legion of Super-Heroes Vol. 2 #291)
Villain(s):
- Mordru (next, voice only, in Superman Vol. 1 #213)
- Mordru's Devils Jury
- Dorzak (first appearance; a 30th Century murderer)
- Golgro (first appearance; a 30th Century assassin)
- Koldan (first appearance; a 30th Century traitor)
- Thrun (first appearance; a 30th Century saboteur)
- Wraithor (first appearance; a sorcerer from Zerox; freed from Mordru's control; dies)
- Mordru's armies
Other Character(s):
- Leah Parker (last appearance)
- other citizens of Smallville
Location(s):
- Space Sector 2814
- Earth
- Metropolis
- Smallville (in the 20th Century)
- Earth
- Unidentified Space Sector
- Zerox (mentioned)
Comment(s):
- Story continued from the previous issue.
Story Reprinted in:
- Limited Collectors' Edition #C-49 (October-November 1976)
- Legion of Super-Heroes Archives #8 (1998)
- Showcase Presents: Legion of Super-Heroes #3 ([April] 2009)
Solicitation:
- Mordu the Merciless has discovered the Legion of Super-Heroes hiding in Smallville's past. Out in the open, the Legion must confront and defeat the powerful sorcerer!