"Create an ultra-realistic and fearsome depiction of Cerberus

"Create an ultra-realistic and fearsome depiction of Cerberus, the three-headed guard dog of the Greek underworld. Cerberus is portrayed as a massive, muscular beast with three snarling, ferocious heads, each displaying rows of sharp, glistening teeth and glowing red eyes. His fur is dark and matted, giving him a wild and untamed appearance. Each head has a unique expression of rage and aggression, with saliva dripping from their open jaws, ready to attack any who dare approach. His powerful body is covered in scars, a testament to countless battles, and his paws are massive, with claws that dig deep into the ground. Around his necks are chains, broken and dangling, symbolizing his captivity to the underworld. The background is a dark, eerie landscape of the underworld, with a river of souls in the distance and the shadowy gates of Hades behind him. The atmosphere is tense and filled with dread, with the ground beneath Cerberus cracked and scorched by his presence. The overall scene captures the terrifying role of Cerberus as the relentless guardian of the realm of the dead, ensuring no soul escapes and no mortal intrudes."