This quest is initiated by examining Stench's Fang that is dropped by Stench in The Serpent Sewer. Stench is a rare spawn snake.
After inspecting it you must bring it to Marcus Puer in The Serpent Sewer ( -36, -0.12, -6 ) Copy . He will ask you to collect a few components for him:
Bring him these components and he will reward you.