The Shapeshifting Creature / Life Avatar also frequently referred to by fans as "Lifealope" because the animal brings plant life back to the wasteland and also has horns similar to that of a mythical animal called the jackalope. It is the main character in the Spin-Off/Tie-In of Romantically Apocalyptic that's currently released every Wednesday.
It is an Avatar of "Cancer" that grew from the same viral spores that created "Cancer Biomass" in a radioactive waste puddle.
The spore that grew into Life Avatar was damaged from the radioactive waste + semi-active pathogen fallout present on Earth after the war that exterminated 99% of Human life on Earth.
Because it's DNA memory was damaged, Life Avatar did not seek to connect with the Biomass.
Life Avatar has the ability to terraform an area (Radioactive grass or normal grass is unknown).
The creature has the ability to shapeshift into any animal form it desires. It has shown that where ever it walks, it terraforms the area back into grassy areas. It is known that Cancer can kill its terraforming.
It shows signs of immortality/regeneration/shedding because after a satellite (Owned by ANNET) destroys both Cancer and Lifealope, Lifealope cracks through a corpse of a bull or reindeer (also speculated to be Cancer's body) as if it was an egg and appear in a blossom of a flower that came out of the corpse.