To start this quest go to Padriela in Carlin's Druid Guild.

Talk with her like this:
You: Hi
Padreia: Welcome to our humble guild, wanderer. May I be of any assistance to you?
You: Mission
Padreia: Oh player, thank god you came to me. Last night, I had a vision about an upcoming plague here in Carlin. ...
Padreia: It will originate from slimes that will swarm out of the sewers and infect every citizen with a deadly disease. Are you willing to help me saving Carlin?
You: Yes
Padreia: I knew I could count on you. Take this high intensified vermin poison. In my vision I saw some kind of 'pool' where these slimes came from. ...
Padreia: Pour the poison in the water to abandon the demise of Carlin. Tell me about your mission after you fulfilled your task.
You: Bye
Padreia: Farewell. |

You will need to use the poison vial on the water at the Slime Place in Carlin's sewers. Get to the black circle on this map to enter the sewer:

Now follow this map (Bugs and Slimes here):

After you followed the map you continue by going down. There will be 2 Slimes here. Kill them and use the poison on the water.

Now report your mission by talking with Padriela like this:
You: Hi
Padreia: Welcome to our humble guild, wanderer. May I be of any assistance to you?
You: Mission
Padreia: You did it! Even if the fewest of the Carliners will ever know about that, you saved all their lives. Here, take this as a reward. Farewell!
You: Bye
Padreia: Farewell. |
Enjoy your loot! |