Side mission - Fish Hole | Act 1 Dungeon Siege III Guide

You can get this mission from Yacob in Raven's Rill (M3,8). In order to complete it, get out of the city and head towards the river (M3,9). Use the secret bait received from the fisherman and lure the monster from the water - the beast is strong, but it shouldn't defend for long. Afterwards return to the city with the Nishemmu tooth. In return for the trophy, you can count for Yacob's help during Unanswered Questions - you will learn that you should look for Grigori (M3,10). Talk with him to finish the mission.

It's best to defeat the monster's underlings first and then attack the beast itself.

M3 - Pilgrims' Road and Raven's Rill