Kazz's class, Dragonblood, is a 3.5E Homebrew that I personally updated to 5E with some help from @Tailon and @Dwayna DragonFire, as Kazz levels in it, he starts to mutate draconic traits, with the end result of becoming a full dragon.
This means he'll need a couple different appearance tokens as he levels, this one, for level 4, is the first major change.