From the back cover:

Why Choose This Game?
Because you collect Mezzo-American sacrificial knives.
Because you always thought you would make a better King of the Sun than Yule Brenner.
Because you planned a trip to Mexico but havn't had time to buy a tourist guidebook yet.
Because you already have Joan of Arc and this game was designed by the same person.
Because it is a game for 4 players and you know your chance to win is 50% greater than with a game for 6 players. (One never thinks about these little things.)
Because you prefer tequilla and know of its sacred origins.
Because it is better to sacrifice than to be sacrificed.
So that this game company will not disappear as did the Aztecs.