Fierceclaws never existed in the timeline the books took place in.
The Jade Mountain Prophecy
Darkstalker mentioned that he and Clearsight would've had dragonets.
The Lost Continent Prophecy
Fierceclaws was mentioned indirectly in Clearsight's thoughts, when she thought that she would always miss the dragonets that she would have had with Darkstalker.
When Darkstalker gave Clearsight the mind reader-blocking bracelet, she said to him that Eclipse would need it most. This led to their first conversation about their dragonets. Darkstalker listed their three future dragonets, Eclipse, Shadowhunter, and Fierceclaws. Clearsight told him that she was not going to let the dragonet be named Fierceclaws, which then led into a friendly debate in which Darkstalker argued that the name Fierceclaws was cool. Clearsight disliked it.
Later in the book, right before Darkstalker was put into eternal sleep, he mentioned to Clearsight that he had forseen that he would never manage to convince her to use the name Fierceclaws for their dragonet.
= Possible timeline
- Fierceclaws is one of 13 hybrid characters mentioned in the series.