The River Styx Picture

The River Styx (Greek: Στύξ, Stux, also meaning "hate" and "detestation") was a river in Greek mythology which formed the boundary between Earth and the Underworld (often called Hades which is also the name of this domain's ruler).
Ducky? line art
The River Styx
Cerberus gun
Cerberus, Gaurdian of the Underworld