It doesn't automatically know the attribute to add to the roll, since every character sheet might have a different attribute name for an initiative bonus. Did you use the commands to add a bonus group with the attribute name for that sheet? I'm fairly sure that sheet uses "initiative" as the name of the bonus, so the command would be something like this: !group-init --add-group --bare initiative If you want dex to be added as a decimal for tie breakers, then you would use this: !group-init --add-group --bare initiative --tie-breaker dexterity