There are several ways to handle this: 1. Rollable Table (would require a separate roll calling that table). If this is a sheet you plan on sharing with the community, this would require each GM to set up the rollable table in their game and it would need the same name as whatever name you give it in your roll button. 2. If you want it done at the same time as the attack roll, then build the roll as part of the Roll Template. This would still require you send the d100 roll to the roll template at the same time (for example, you could send it with something like {{Location=[[1d100]]}}. If you go with 2, you'd need to still send the d100 roll with the rest of the rest of the roll, you'd just need to use the Roll Template helper functions to display the proper information. For that, you're going to want to use the roll template helper functions . You'd just need to construct your roll template with that stuff in mind.