Calculate

By means of this spell, the caster can accurately estimate the chance of success of one specific action, such as climbing a dangerous cliff, making a trick bowshot, crossing a burning room unharmed, or even striking an enemy. The action in question must be one that would normally be resolved by a die roll, but the caster doesn’t have to be the person who attempts the feat; he can use calculate to estimate the odds for anyone taking an action in his sight. For example, he could reveal a particular opponent’s Armor Class, the saving throw an opponent would require in order to save against a particular spell, or a character’s chance to open doors, bend bars, or use a thief ability. The caster could even calculate his odds for actions that might be resolved by a die roll or DM caprice, such as his chance to avoid detection by hiding behind a rock. This spell takes into account factors that the caster himself may not be aware of, so from time to time a character may receive some very confusing results from this spell. For instance, if the priest doesn’t know that an orc chieftain is actually a polymorphed Gold Dragon masquerading as an orc, he may be astonished to learn that the “orc” has a AC 19! If the Caster fails his calculation check with a roll of 1 or 2 on a D100, his calculation is wildly skewed in a random fashion.