Antaeus

Antaios was based in Libya, and every stranger who passed by had to fight him. But the giant always won, and the loser paid with his life. The skulls of the victims were collected by Antaeus on the roof of the Temple of Poseidon. In his cave, he fed on lion meat and slept on the bare ground to increase his strength.

Antaeus was also encountered by Heracles on his way to the garden of the Hesperides to collect golden apples. Their duel was very evenly matched. For a long time, Heracles didn't understand where the giant got his strength. But then he noticed that when his strength waned, he clung to the ground and regained his strength. So Heraklés lifted him into the air and as Antaeus ran out of strength, he strangled him.