Major Rituals are the most potent of incantations to be used by mages on Sinai. They generally take at least a day to cast, though this class includes rituals that could take much longer than that. Since no one mage is likely to have the endurance to keep an incantation going continuously, without break, without error, for several hours -- let alone several days -- continously, such powerful spells typically require several assistants and fellow mages to cast properly ... and to safeguard against mistakes. Due to the trouble and expense of Major Rituals, they are the least used of the classes of incantations to be found on Sinai ... though their effects are by far the longest-lasting, and the most likely to be celebrated in legend.
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