What I want is a macro that does something like this: /r @{PB-1}d8 I know the above macro doesn't work . I'm trying to figure out what I need to do to make it work. I want to roll a number of d8s that's always 1 less than my character's proficiency bonus. How do I write this in a macro? Alternatively, how do I set up an attribute field on the roll20 5e sheet so I can just call that attribute for number of d8s? Because I know writing @{PB}d8 works, so hypothetically some macro like @{number}d8 would also work, with "number" being an attribute I've set up that's always 1 less than PB.