Labor Twelve: the Capture of Cerberus (concluded)

But Heracles simply glowered so fiercely that Charon meekly conveyed him across the Styx. The greater challenge was Cerberus, who had razor teeth, three (or maybe fifty) heads, a venomous snake for a tail and another swarm of snakes growing out of his back. These lashed at Heracles while Cerberus lunged for a purchase on his throat. Fortunately, the hero was wearing his trusty lion's skin, which was impenetrable by anything short of a thunderbolt from Zeus. Heracles eventually choked Cerberus into submission and dragged him to Tiryns, where he received due credit for this final Labor.