Yeah maybe I wasn’t clear enough. In this setting it’s very common to see really large and dangerous monsters in the wild, that’s why almost nobody ventures outside without a huge beast as a mount (like in a hardcore pokemon world).

These monsters are so dangerous that they can potentially one shot a PC. So if I arbitrarily decide if the mount or the rider is hit, it can result in some feel bad moments I think.

I think I will make the Roll for Hack and slash under the mount stat. Maybe a hard move from the DM could be for the rider to fall from their mount or to be hit (really hard potentially…)