\b0 Son of \b \cf4 \ATXht12021 Typhoeus\b0 \cf0 \ATXht0 and \b \cf4 \ATXht10500 Echidna\b0 \cf0 \ATXht0 , he was the
monstrous dog that guarded the entrance to \b \cf4 \ATXht10800 Hades\b0 \cf0 \ATXht0 . He was generally described as having three heads and a serpent's tail. Hercules captured him with his bare hands and took him up to earth to show to \b \cf4 \ATXht10520 Eurystheus\b0 \cf0 \ATXht0 before sending him back to \b \cf4 \ATXht312 Hades\b0 \cf0 \ATXht0 .