Assuming the Aztec kingship after the capture and suicide of his nephew Chimalpopoca, Itzcóatl instituted enormous social changes that became the driving force behind a century of expansion and conquest. He created a feudal system that concentrated power in the hands of the ruling classes and, by creating a system of reward based on taking captives in battle, he made military prowess a key path to gaining social rank. He even re-wrote Aztec history and religion to reinforce his radical reforms. By forging an alliance with two city-states, Itzcóatl conquered the Tepanecs in 1428, and ultimately elevated himself to the position of the first of the Aztec Emperors. Use Itzcóatl, the Obsidian Serpent, to rewrite history with the defeat of all who stand before you in the Anachronism arena.