Heracles, driven mad by Hera, slew his children by Megara. Once he was cured of the madness, he went to the Oracle of Delphi, who directed that he should serve King Eurystheus for ten years and do anything he bade. So, Eurytheus, has his mother Hera's behest, sent Heracles on his labors, expecting that he would die attempting them.
the 12 labors:
The Twelve Labors of Heracles were demanded by Hera, wife of Zeus, and given by Eurystheus, the king of Tiryns and Mycenae.
Heracles
12
Because he did 12 impossible labors
In one version of a myth on Heracles and the twelve labors, Heracles did for a while.
Heracles was driven mad by Hera and in his madness he killed his children. To repay for this crime he was set 10 labors by his archenemy Eurystheus. However of the first 10 labors Eurystheus only accepted 8 of them and assingned him two more. If Heracles completed all the labors his sins would be forgiven and he would be granted immorality.
The golden apples of the Hesperides.
Heracles (Greek) Hercules (Roman) had to complete 12 labors.
Athena- in her chariot
Hercules (greek name) or Heracles (Roman Name)
The hero Heracles (Hercules) performed the twelve labors after being driven mad by Hera to kill his children.