Adventure Comics 310

Adventure Comics #310 Preboot » Pre-Crisis Story title The Doom of the Super-Heroes Previous story Adventure Comics #309: The Fake Superboy from Krypton Next story Adventure Comics #311: The War Between the Substitute Heroes and the Legionnaires Publication date May 29,1963 Cover date July 1963 Creators Writer(s) Edmond Hamilton and Mort Weisinger Penciller(s) John Forte Inker(s) John Forte Letterer(s) Milton Snapinn Colourist(s) Unknown Editor(s) Mort Weisinger

The Doom of the Super-Heroes

The Legionnaires confront a mysterious villain in a lead mask who possesses each of their powers. But when Superboy destroys the stilts that the villain uses to make himself look taller, “Mask Man” is revealed to be a dwarf. As bystanders laugh at him, Mask Man vows to kill every Legionnaire in return, and starts by hitting Ultra Boy with a freeze ray. He then escapes before the Legionnaires can follow him.

After mourning the death of Ultra Boy, the Legionnaires believe that Mask Man must hail from Doll World, a planet of diminutive people. Every Legionnaire travels in two ships to Doll World, where Shrinking Violet, Chameleon Boy, and Invisible Kid use their powers for reconnaissance. However, Mask Man surprises and kills Shrinking Violet and Chameleon Boy. Before the villain flees, Superboy hits him with a radioactive rock; the Legionnaires use the radioactivity to track Mask Man through the Mount Rushmore of Space. But a large asteroid bearing Mask Man’s image collides with one of the ships, killing Triplicate Girl, Phantom Girl, Element Lad, and others on board.

Part 2: Last Stand of the Legion

The remaining Legionnaires travel to a nearby uninhabited planet and build a citadel to protect themselves until they can figure out how to fight Mask Man. But the villain pushes several giant Rushmore monuments toward the citadel. As the Legionnaires defend themselves, Colossal Boy, Cosmic Boy, and Invisible Kid are all killed. Later, Saturn Girl and Brainiac 5 die in an explosion while working on a “reverser-instrument.” The villain also turns Lightning Lass into stone and kills Mon-El with a radioactive element from another dimension, leaving only Superboy.

However, Mask Man’s use of an extra-dimensional element provides Superboy with a clue to his true identity. He finishes work on the reverser-instrument and follows Mask Man to a world where the villain has carved the letters MXYZPTLK on each of the world’s eight moons. As Superboy guessed, Mask Man is really a descendent of his impish enemy, Mr. Mxyzptlk. When Mask Man sees the reverser-instrument, he recognizes Superboy’s ploy to get him to say his name forwards so that it will come out backwards and send him back to the Fifth Dimension. Out of spite, Mxyzptlk says his name backwards, but just as he does so, Superboy uses his heat vision to burn out the reverser-instrument’s wiring so that it does not reverse his speech. As the villain vanishes, so, too, do the effects of his magic: The Legionnaires are restored to life with no memory of the adventure.

Roll Call

Legionnaires

Feature roles:

• Brainiac 5
• Chameleon Boy
• Colossal Boy
• Invisible Kid
• Lightning Lass
• Mon-El
• Saturn Girl
• Shrinking Violet
• Superboy
• Ultra Boy

Supporting roles:

• Bouncing Boy
• Cosmic Boy
• Sun Boy

Cameos:

• Element Lad (face depicted on splash page and mentioned in story, but no other appearance)
• Star Boy (face depicted on splash page, but no other appearance)
• Triplicate Girl (face depicted on splash page and mentioned in story, but no other appearance)

Villains

• Mask Man (Mxyzptlk; a descendent of Mr. Mxyzptlk)

Supporting Characters

None

Other Characters

• Ak Aru (scientist of Doll World)

Planets and Settings

• Doll World
• Mount Rushmore of Space

Technology, Gadgets, and Other Neat Stuff

• The reverser-instrument

Notes

Errors and Oddities

• Supergirl, Matter-Eater Lad, and Phantom Girl do not appear in this story (although Phantom Girl is mentioned), even though every Legionnaire is said to take part in the search for Mask Man.
• Sun Boy and Bouncing Boy mysteriously disappear from the story. They are shown on Page 5 of Part 2, yet Mon-El says on the next page that only he, Superboy, Lightning Lass, and Invisible Kid are left alive. No mention is made of how Sun Boy and Bouncing Boy died.
• It is never explained how Brainiac 5 is able to devise a machine that can reverse Mask Man’s powers without knowing the nature of those powers.

Text features in the same issue

This issue also contains a text feature:

• "Bits of Legionnaire Business
  • First mentions of Duplicate Boy and Spider-Girl (as Spider-Lass)