The cerberus is such and epic mythological creature. Our artist, Survival, captured it perfectly in this glorious design.

Here is a little more info from Wikipedia about the Cerberus.
"Cerberus (Greek: Kérberos) in Greek and Roman mythology, is a multi-headed dog which guards the gates of Hades, to prevent those who have crossed the river Styx from ever escaping. Cerberus featured in many works of ancient Greek and Roman literature and in works of both ancient and modern art and architecture. As with most creatures from classical mythology, the depiction and background surrounding Cerberus often differed across various works by different authors of the era, the most notable difference being his number of heads; while most sources describe or depict three heads, others show him with two or even just one, a lesser number show a variable amount, sometimes as high as 50."