To represent greed, I chose the image of a red dragon and his hoard. I chose this for the simple fact that dragons are quite possibly the most beautiful, deadly...and GREEDY creatures in literature or games. There has rarely been a dragon that was not wallowing in treasure. Smaug, the Nidhogg Serpent...greed drove them to evil, and to their ultimate demise.
The dragons' face holds an expression of threat and disdain. He's sneering, clutching a human skull, offering death to any who dares to claim HIS treasure. To me, this is the ultimate representation of greed.