Your character fuses with his animal companion and they do movement and attacks as a single entity. Applying bonuses from related feats and gear. There is a class focused on mounted combat - Cavalier, a cross between fighter and palladin. Mounted charge on a horse with a lance does devastating damage.
Thanks for the explanation. Sounds neat. Are you sure they act as a single entity though? I just watched a video where the guy claims they still act independently despite moving as one unit.
https://youtu.be/mqqLJpEQWT0?t=258
I realise this is dangerous talk, but what I've seen of this isn't doing much for me. The whole world-is-on-fire-and-there's-demons-everywhere setting doesn't really appeal.
Whew… I thought I was the only one.
Mechanically, it looks solid, but I'm not overly enthused about the setting.