The ghost tide is coming in.
Under the Pyramids, Nyarlathotep has stitched together the forgotten dead into mockeries of the small gods of Earth.
Drawtober 2 - Shapeshifter
Carnishut shapeshifters are one of the hazards of Earth in the year 16,000.
These beings spend most of their time as humans but when severely stressed or injured rapidly and uncontrollably mutate into powerful hypercanivorous forms. In their other forms they experience massively heightened aggression against the source of their transformation. The transformation lasts until they've consumed enough flesh to restore their humanity, by giving birth to themselves in a new body with no memory of their time as a monster or their trigger. Due to this some Carnishut aren't even aware of what they are, only that they sometimes black out and wake up in strange places covered in goo.
Carnishut transformations are a common boogey-man tale to inspire good behavior, although the exact triggers are unknown to most cultures. The exception are the Kalrathi tribes, who are exceptionally kind and respectful to strangers.