There are a couple ways to do this. I'm assuming that you want it to add 5 to the result of the check, if that's true, then you can do one of the following: You can do like you have, and simply put a +/- there (or have it in the ability) Pros: simple, and can work with just chat, no popups necessary Cons: Doesn't work with roll templates, or if you need the mod in multiple places/not at the end of the ability You can utilize roll queries to add the modification into your ability wherever you need it. Pros: The same mod can be used as many times as you need it from one entry. Works with roll templates. Cons: You'll be asked for a mod every time you roll that ability. Requires rewriting your ability.