Mike F said: Hi guys, really appreciate the feedback and starting to get some macro's to work. Is there a listing anywhere of what attributes you can call when using commands like "selected" and "target" There's no Roll20 generic listing, as you can call any attribute or ability using selected and target, and what attributes and abilities beyond things like character_name are available is completely dependent on the user and the character sheet being used.. The links that Silvyre posted are where this info is posted, specifically in the Macros wiki page. If you are having problems figuring out the naming convention of attributes/abilities in the sheet you are using. Check out the sheet's wiki page. The 3.5 one is located here: <a href="https://wiki.roll20.net/Dungeons_and_Dragons_3.5" rel="nofollow">https://wiki.roll20.net/Dungeons_and_Dragons_3.5</a> The error that you are getting is most likely caused by an incorrect attribute/ability call that it can't resolve.