Antaeus
Antaeus was a huge giant, son of Poseidon and Gaia, whose power came from physical contact with his Mother Earth. As king of Libya, he challenged all newcomers to his kingdom to a wrestling match and won, killing them. Conscious of the source of Antaeus' strength, Hercules, using his huge muscles to hold him above the earth, finally triumphed over Antaeus by removing him from his source of power.
Herakles' battle with Antaeus is just one of a number of trials of strength he undertook on his mission to secure the Golden Apples of the Hesperides, his 11th Labor.