You can only get it on his special level which comes with his character pack
GET soul gem and unlock the soul gems upgrade
I'm pretty sure you find it in dragon's peak which you have to buy to unlock and it comes with sunburn.
Darklight krypt is where you find sunburns soul gem
Dragons peak
You find it on Cadavourus Crypt
you find the soul gem in darkwater cove but i dont know the exact place in the level
dark light krypt
in the level empire of ice but you have to buy it
Sorry I don't know but I know where Sunburns soul gem is it is in Dragon's Peak about 5 minutes into it lean of the island and there is a dragon waiting there to take u to his soul gem
get empire of ice and start looking
as well as Terrafin, sunburn and ghost roaster you find it in his adventure packs level
no