Cuicuilco was a great city in the Mexican central highlands, until its destruction in A.D. 150 by an erupting volcano. Teotihuacan went on to become the most powerful remaining city of the region. Some mages speculate that Cuicuilco's demise was planned in a fiery disaster to end its potential threat, while others attribute its end to the act of angry gods or unfortunate , tectonics. Whatever the case, some sort of ritual has been handed down that points to magical influence.

The mage must sacrifice a human victim, as might be expected for magic of the Mesoamerican sort, in order to awaken the power of the volcano (fire gods and what-have-you, after all). In some versions, the victim might actually be thrown into the volcano; in others, the subject is merely slaughtered near the volcano's base. Either way, the ritual is dangerous, since it is unlikely that the mage will get out in time.

System: Effect successes generate tremendous tectonic forces and pressurization of material in the heart of a chosen volcano. With enough successes on such a ritual, the mage could theoretically cause a volcano to erupt, perhaps destroying an area just as Cuicuilco was destroyed. Such an Effect is a phenomenal feat, easily requiring twenty or more successes for even a marginal result; a mage who scores fewer successes might succeed in getting some unpleasant burbling and maybe a single stream of lava from a volcano, but no spectacular eruption. Don't botch.