Reincarnation Origins: Dullahan

Revamped the Nightmare Steed!

You now mount up as soon as it is summoned, and it gets banished back to the hell realm it came from when you dismount.

It also falls slowly to the ground and can run over both water and lava.

I find this feels better as a mount-type summon, as opposed to before where you had to keep track of it and it was just a bit awkward to have around. This can also be used as an emergency falling escape in midair.