Ehh, this news is around a week old? Also, the skill is not a Pyromancer C3 skill but is a Pyromancer C1 skill if my sources are correct.
LOVE THE NEW SKILL SO MUCH THANK YOU IMC 
We haven seems it in action…
Not sure if it counts or not but if you went to the “link in the OP to the entire summary” button in this quote, you would have been able to see the skill “Flame Ground” on a webms video.
Sorry I missed posting this in my first post since it seems like it was important .-.