Cerberus

Cerberus is a creature in Greek mythology,Cerberus or Kerberos,  in Greek and Roman mythology, is a multi-headed (usually three-headed) dog, or "hellhound"  which guards the gates of the Underworld, to prevent those who have crossed the river Styx from ever escaping and a doublet ("brother") of Orthrus.

Appearance
It is a gigantic hell hound with multiple heads( generally three), covered with a black skeleton like substance also Cerberus posses arm blades which are refractable and almost industrible. , large enough to dwarf its own brother Orthrus,he is atleast twice bigger than Orthrus. It has Wolf-like limbs and three tails which can be ignited if required. It is predominantly purple in colour with the exception of its black skeleton, legs and the markings around its eyes.The heads are surrounded by dog collars which are attached with chains and cerberus can grow wings made of flame if necessary.

Abilities
Like his brother Orthrus,Cerberus has the ability to breathe flames and manipulate fire around him, When it opens its mouth and inhales, it can create a powerful suction that sucks in everything within a large radius, while at the same time exhaling through its mouth.Cerberus can summon the gates of hell and drag an enemy to hell along with him. Cerberus posseses a vast amount of chakra which easily overwhelms that of Orthrus,It has also being noted that it was extremely fast despite its massive size,even faster than Orthrus.Cerberus can grow wings made of flame if necessary,Cerberus is shown to be extremely durable, even all the attacks made by Orthrus did not affect him at the slighest.