For the Pyro kit, you spawn with the Embers Sword and a fire trail spell. Also with the Pyro kit, you are immune to all fire (Embers Sword, fire charges, fire trails, etc.). You automatically get another fire trail spell book 20 seconds after last use. Other names for the kit could be Torch, Inferno, Blaze, or Flare.
Hey there
I really love this Kit idea. It would definitely bring me playing more Skywars kits!
Also, in the future I think Hive would decide to add more kits appealing to some spell books! You have my vote!