I'm specifically looking to do this for a subclass, but I imagine the concept is similar for races and feats? I'm thinking something along the lines of a Wildfire Spirit for Circle of Wildfire Druids. It seems like the coding mechanics of it to appear within character sheets is complicated, and just getting that visual statblock in the description eludes me. If you're not sure, there's no need to respond! I may just have to come up with a different concept for this subclass.

To get the statblock into the description, find a statblock you like, highlight it and copy/paste it into your description. Then you can edit it as needed if you want to.