What explorer amazed the Aztecs?

Hernán Cortés was the explorer who amazed the Aztecs. When he arrived in 1519, his arrival coincided with a prophecy about the return of the god Quetzalcoatl, leading many Aztecs to initially view him with reverence. His technological advantages, such as firearms and horses, combined with strategic alliances with local tribes, allowed him to capture the Aztec capital of Tenochtitlán and ultimately lead to the fall of the Aztec Empire.