From the Designer's Website:
Les cruels prêtres aztèques renaissent, assoiffés de sang et vénérant le soleil...
User Translation from French:
The cruel Aztec priests are reborn, thirsty for blood and worshipping the sun...
Characters have 12 points to distribute between five attributes: physique (physical), psychique (mental), magie (magic), sang (blood), soleil (sun). Each attribute has a minimum value of 1, excepting sang (a measure of health) which has a minimum of 3. Mortals purchase points of sang and soleil at twice the basic cost that mummies use.
Task resolution is performed by rolling a number of six-sided dice equal to the appropriate attribute value, keeping the single best die roll. To this roll, add 2 if a double was rolled, 3 if a triple was rolled, etc. (regardless of whether these were of the same value as the highest die roll or not). If the result is equal to or higher than a target difficulty number (or an opponent's result if in an opposed action) then the character is successful.