Thanatos was the Greek god of death. Unlike the Erinyes, he was the god of peaceful death, just touching a person and then they die. Thanatos was born to Nyx and Erebos. As well as his twin brother is Hypnos, the god of slumber.During a war, Thanatos and his brother Hypnos carried the dead body of Sarpedon off the battlefield and into Hades.
Sisyphus often killed guests and travelers, which violated certain laws the gods put into place. He also had children with his niece, had stolen his own brothers right to the throne, and betrayed Zeus. Because of this, Zeus ordered Thanatos to throw him into Tartarus. Thanatos was tricked by Sisyphus, however, when Sisyphus asked Thanatos to show him how the chains worked. Thanatos showed him, and Sisyphus sealed him in Tartarus. Days passed, and no human or monster would die. Ares soon found out the problem, and released Thanatos.
Taken http://greekmythology.wikia.com/wiki/Thanatos
Sisyphus often killed guests and travelers, which violated certain laws the gods put into place. He also had children with his niece, had stolen his own brothers right to the throne, and betrayed Zeus. Because of this, Zeus ordered Thanatos to throw him into Tartarus. Thanatos was tricked by Sisyphus, however, when Sisyphus asked Thanatos to show him how the chains worked. Thanatos showed him, and Sisyphus sealed him in Tartarus. Days passed, and no human or monster would die. Ares soon found out the problem, and released Thanatos.
Taken http://greekmythology.wikia.com/wiki/Thanatos