Osiris was killed by his brother Seth, who shut his body in a chest and threw it into the Nile, where it washed up onto the shore and was trapped in a huge tree. The King Byblos turned it into a pillar in his palace. Isis (who had been searching for her husband) discovered the trunk, and retrieved the trunk and the body. While Isis was away, Seth found the body, and chopped it up into many pieces, and scattered them throughout Egypt. Isis and her sister, Nephthys, found the pieces and made wax models of them to give to priests to be worshipped. When they found all of his pieces, they were so sad they wailed loudly enough for Re, the father god, to have pity on them. He sent Anubis and Thoth to help. They mummified Osiris, and put his body in a lion headed pier. Isis changed into a kite and fanned breath into Osiris.
He was not allowed to stay in the land of the living, and was sent to the underworld to serve as king, and to judge the souls of the dead.