THE AVENGERS BATTLE... THE SPACE PHANTOM

The Avengers gather once again at Tony Stark's Manhattan mansion for a routine meeting. Despite having recently formed as a team, tensions already simmer beneath the surface. Thor and the Hulk exchange insults almost immediately, forcing Iron Man and Ant-Man to intervene before their disagreement erupts into a fight. Ant-Man and the Wasp arrive late, revealing to their teammates that they possess capsules that allow them to instantly alter their size. Although the heroes attempt to settle into a productive discussion, none of them realize that a far greater threat is approaching Earth.

Far beyond the planet, an alien known as the Space Phantom arrives after weeks of faster-than-light travel. Sent as the advance scout of a conquering extraterrestrial race, the Phantom's mission is simple: determine whether Earth's greatest defenders can be defeated. Possessing the ability to perfectly duplicate any living being, the alien lands unnoticed and immediately tests his power on a random pedestrian. By assuming the man's form, the original victim is banished to a strange dimension known as Limbo, a realm between existence and nothingness. Satisfied that his powers work flawlessly, the Space Phantom heads directly toward Avengers Mansion.

The alien infiltrates the mansion by posing as an ordinary visitor. Before the Avengers can question him, he secretly uses his powers on the Hulk, sending the real Hulk into Limbo and taking his place. Disguised as the green giant, the Space Phantom deliberately provokes the other Avengers. His unusually hostile behavior quickly ignites tempers. Iron Man and Thor become convinced that the Hulk has turned against them, and a confrontation breaks out. After successfully driving a wedge between the teammates, the disguised alien storms out of the mansion, pleased with the discord he has created.

Outside, the Space Phantom encounters Rick Jones, the Hulk's closest friend. Rick immediately notices that something is wrong. The Hulk fails to recognize him and behaves unlike his usual self. Amused by the boy's suspicions, the alien reveals the truth, briefly returning to his natural form and allowing the real Hulk to reappear from Limbo. Before Rick and the Hulk can react, however, the Phantom assumes the Hulk's form once again, sending the genuine Hulk back into exile. Armed with the knowledge of the villain's powers, Rick desperately contacts the Teen Brigade and broadcasts an emergency signal to Giant-Man.

Meanwhile, the Space Phantom continues his scheme. Still disguised as the Hulk, he attacks one of Tony Stark's military installations and steals an experimental missile launcher. The incident enrages Iron Man, who races to confront his teammate. The two battle fiercely, but the alien is unprepared for Iron Man's ingenuity and tactical skill. When the fight begins to turn against him, the Space Phantom abandons the Hulk's identity and transforms into a passing wasp. The real Hulk instantly returns from Limbo, leaving Iron Man confused by his opponent's sudden change in behavior.

Rick's message finally reaches Hank Pym and Janet van Dyne. Transforming into Giant-Man and the Wasp, they rush to investigate. They find Iron Man and the Hulk on the verge of another battle and manage to calm both heroes before things escalate further. However, the Space Phantom remains nearby in insect form, carefully observing the situation. When the Wasp senses a strange presence and begins pursuing the mysterious insect, the alien seizes a new opportunity. He abandons the wasp form and assumes Giant-Man's identity, banishing the real Giant-Man to Limbo.

Now armed with Giant-Man's tremendous size and strength, the Space Phantom launches a direct assault on the Avengers. The Hulk quickly realizes that the giant attacking them is not his teammate. A massive battle erupts throughout Stark's factory complex as the alien uses Giant-Man's powers against the heroes. Although the Hulk proves physically stronger, the Phantom remains dangerous because he can abandon one identity and assume another at any moment. When the battle begins turning against him again, he transforms into Iron Man, causing the real Giant-Man to return from Limbo.

As chaos engulfs the factory, the Wasp seeks the only Avenger not yet involved in the battle. She locates Dr. Donald Blake and summons Thor. Moments later, the God of Thunder arrives at Stark's factory and immediately recognizes that the armored figure battling his teammates must be the impostor. The final confrontation begins as Thor, Giant-Man, Hulk, Wasp, and Iron Man all unite against the shape-shifting alien.

The Space Phantom, disguised as Iron Man, uses the armored Avenger's weapons to keep the team at bay. Thor counters by summoning a violent thunderstorm that drenches the battlefield. The rain begins affecting the Iron Man armor, limiting the alien's mobility. Realizing defeat is near, the Space Phantom attempts one final transformation. Believing Thor to be merely another powerful Earth being, he tries to assume the Thunder God's identity.

The plan backfires catastrophically.

The Phantom's powers work only on mortal creatures. Thor is not human but an immortal Asgardian god. Instead of sending Thor to Limbo, the alien accidentally banishes himself. The real Iron Man immediately returns from Limbo as the Space Phantom vanishes into the shadowy dimension he had used against so many others. With no replacement available to free him, the villain becomes trapped there indefinitely.

Although the Avengers have won, the victory comes at a cost. Throughout the ordeal, the Hulk witnessed how quickly his teammates suspected him, distrusted him, and turned against him. Their words and actions leave a deep emotional wound. Convinced that the others secretly fear and resent him, the Hulk declares that he no longer needs the Avengers. Ignoring their attempts to reason with him, he leaps away into the distance.

The remaining heroes watch him disappear. While relieved that the immediate danger has passed, they realize that the Hulk's departure may create problems far greater than those posed by the Space Phantom. The Avengers remain united, but one of their founding members has chosen to walk away, leaving Earth's Mightiest Heroes forever changed.