Crafty Chameleons Confound Cosmic Crusaders

Durlans were eyed suspiciously when they mixed with humanity during the 30th century. As "Chameleons", these shape-shifters had both noble and corrupt members of their society. On Earth-One, Rokk Krinn as Cosmic Boy was recuited by a disguised Durlan named R.J. Brandt into founding the teen team known as the Legion of Super-Heroes, which Brandt's son Reep Daggle... also known as Chameleon Boy... joined. 

The Legion would face their share of insidious Durlans, such as one known as Jall Tannuz who worked with the Legion of Super-Villains as Chameleon Chief, a Chameleon Kid who tried to take Reep's place on the Legion, and Yera who impersonated Shrinking Violet for several months before being revealed as Chameleon Girl. There was also a trio of Chameleon girls who impersonated three of Superman's love interests: Lori Lemaris of Tritonis, Lyla Lerrol of Krypton, and Luma Lynai of Staryl. The trio attempted to hold Superman under their romantic sway, until Lois Lane outed them. These events sowed seeds of distrust, yet despite this, Rokk stood by Reep as fellow Legionnaires serving together for years.

Nevertheless, Reep was instrumental not only in the main Legion, but also as the leader of the Legion Espionage Squad, which was tasked with engaging in activites that the main team could not. Assisted by fellow teammates Shrinking Violet, Phantom Girl, both Invisible Kids, Shadow Lass, Duo Damsel and Dawnstar... this mini-group has been instrumental in protecting the United Planets from threats such as a rogue President in its midst. As they operated in secret, most of this team's tales have been untold.

This no doubt mirrored the relationship of another Rokk.. a Rock of the Space Legion... who defended his world alongside the Defender and former Durlan named Hald. Indeed, Hald first met Hawkman on another occasion when the Justice Society traveled to his era, and unlike his fellow Chameleons, Hald protected his adopted world with honor. 

As such, he undoubtedly stood opposed to actions of the Chameleon Chief Knelo and other agents of his people. Knelo and his minions, such as Chogpu, impersonated various prominent indivduals of Earth-Two's New Modernia, in an effort to control the political, miltaristic, and commercial aspects of that world. 

Despite their ingenuity, these displaced Durlans found themselves thwarted at each turn by superheroic pairs from a thousand years in the past, who's presence would inspire the protectors of this new world to more vigorously guard humanity and outer space from such threats.

The Space Legion of Earth-Two themselves had several encounters with the Durlans of their universe. Their most renowned member, Rock Braddon, first faced off against these Chameleons when he and his partner Curly were manipulated into battling Flash and Wonder Woman. These two heroes, along with their teammates of the Justice Society, traveled to Rock's era from the 20th century to help combat this invasion. Rock and his fellow Legionnaires soon discovered the true threat facing their world originated from the shape shifting Durlans led by Knelo, who were exiled after a final confrontation with the Society.

Sometime later, Rock and Curly once more faced the Durlans, now led by a different leader named Yuk-Yuk who tried to invade the desert planet of Koola. The pair successfully defeated the Chameleons, who would be incarcerated on that world indefinitely.