Rerolls and Rolling Twice

Some abilities allow you to reroll a failed die roll—usually an attack roll, a saving throw, or a skill check. Unless an ability says otherwise, you must decide to use a reroll as soon as you know the result of your first roll but before the GM tells you the outcome or you declare the use of any other ability. You use your rerolled result only if it is better than your original result. There are also abilities that allow you to make two rolls for a specific die roll and take the better of the two results. These abilities require you to decide to roll twice prior to the die roll. Some abilities allow you to force a foe to roll twice and take the worse of the two results. These abilities also must be announced prior to a die roll being made. In most cases, once an ability to either reroll or roll twice (or force a foe to roll twice) has been applied, no other similar ability can be applied to that same specific die roll. There are exceptions, however. If one character forces a foe to roll twice and take the worse result, that enemy can still apply the ability to roll twice and take the better result. The reverse is also possible—countering the advantage of rolling twice by forcing a foe to roll twice with a worse result. In both cases, the two abilities negate one other, resulting in a single die roll being made. That die roll cannot then benefit from an ability that would allow a reroll.