You, as the GM, can /w GM <roll> and you will be the only one to see it. Players can /w GM <roll> to show their roll to themselves and the GM. You need an API script to enable players to initiate a roll that ONLY the GM sees. *** The order of operations will expand any attribute calls before evaluating the expresion. That means you cannot call an attribute, table, or other construct that holds a value of another roll. You will just get plain text back.