Cosmo was mainly concerned with the safety of the remaining citizens of Knowhere who were safely hidden away in a dimensional envelope he wore on his collar.

It was not long before Cosmo and Nova were ambushed by more zombies including the surviving members of Suspensor's former team; the Luminals, and determined that the creature known as Abyss was behind the mayhem.

[5] Cosmo then charted a course to the birthplace of the Phalanx, the planet Kvch, in hopes that he can find a way to cure himself of the Transmode Virus that is slowly killing him.

Then, alarms were triggered when a murderous Gamora and Drax the Destroyer (now under the control of the Phalanx) slaughtered many residents in search of Nova.

[6] Peter Quill's original Guardians of the Galaxy team operated out of Knowhere for some time, thus dragging Cosmo into many of their adventures.

During one such adventure, Cosmo and the Guardians bounce around the time stream in an attempt to stop The Fault, a tear in the universe, from eliminating all of reality.

One by one Cosmo convinced The Silver Surfer, Gladiator, Beta Ray Bill, Quasar and Ronan the Accuser to team up and protect the universe together, as was Starlord's final wish.

In the process, he found the foreign body inside of the psychic dog that disrupted his powers and thus, saved Cosmo's life.

[11] In addition to a dog's standard enhanced sense of hearing and smell, Cosmo has psionic abilities, including high-level telepathy and telekinesis.

[13] A gender-flipped version of Cosmo the Spacedog appears in media set in the Marvel Cinematic Universe, physically portrayed by dog actors Fred and Slate and voiced and motion-captured by Maria Bakalova.