Cronus

There was a prophecy, the prophecy told that one of the Cronus's children would take his place in the ruler of the world. Concerned by this prophecy, he devoured all the children that were already born. Rhea, his wife and sister, as pregnant and afraid, so when her last baby born, Cronus demanded her to give the baby to him, but instead of the baby, Rhea covered a rock in a blanked and gave it to him, he devoured the rock thinking it was the baby. She hide the baby from everyone since that.