The Wager of the Gods is what caused Kratos to seek Asclepius' Ambrosia. Ares, Poseidon, Hades, Artemis, Helios, and Hermes chose a champion and gave them a reason to seek the Ambrosia--usually by cursing their champions (or their loved ones) with afflictions that could only be cured by their ultimate prize. The winner of the wager would get a statue of themselves erected in a new temple dedicated to them - however, Hermes claimed that he would have several statues erected all throughout Greece if his champion was victorious.