User blog comment:Imouto-tan/Huozai/@comment-26362471-20160723161815/@comment-26362471-20160726135937

The demon didn't really give him anything besides a pretty face and Cursed Resurrection. The demon went along to nothingness with Huozai upon being killed by Karmic Retribution.

Huozai's arsenal of powers comes from getting used to fighting people with these abilities countless times until he could start fighting them.