Quote Originally Posted by Amnestic View Post
Now we just need to settle the argument of what Int (Arcana) DC I need to hit on my fifth level samurai fighter to cast Fireball.
Fair point. In the case of my table, it was jumping down (like parkour) vs the monk's slow fall. All characters can jump, and the vertical jump doesn't specify that you have to jump "up". But the DM told me if I was jumping "down" it would be like the monk's feature.

I think there is a difference between an action approximating something a different class feature can do, and straight up rolling to have a class feature. Like I don't think you can roll to gain weapon proficiencies, and I don't think you could roll to gain spellcasting.