Ayar Cachi (in hispanicized spelling) or Ayar Kachi (kachi means salt in Quechua ) was one of the brothers of Manco Cápac, who emerged from the cave at Paqariq Tampu. He could shoot down hills with a single shot of his sling.
His brothers feared him, so he was sent back to the cave they came from and trapped in it with rocks.
References
Ayar Cachi Wikipedia(Text) CC BY-SA