Close Encounter of the Rat Kind

Step 1

Ellie and the entrance to the sewers

1. Talk to Ellie at [5,-18] to take the quest.
2. Go to [4,-19] and enter the sewer.
3. Inside, press the large wall to get the Shiny Sewer Mushroom.
4. Talk to Sick Grossewer Rat at [4,-19].
5. Defeat 2× Sick Grossewer Rat (any map)
6. Defeat 2× Ratworm Apprentice (any map)
7. Defeat 2× Sick Tofu (any map)
8. Defeat 2× Sick Arachnee (any map)
9. At the end of the hunt, talk to Underatlord's Emissary.

Step 2

Underatlord, Adviser Arky and Magus Ax

1. Talk to Underatlord to explain the situation and receive the bottle of Grafina.
2. Talk to Adviser Arky at [1,-20].
3. Go to [5,-18] and talk to Magus Ax.
4. Talk to Adviser Arky again until he sends you to the militia.

Step 3

Militia, antidote and Mutant Rat

1. Go to the militia at [1,-17] and go down to the basement.
2. Pour the antidote into the baths.
3. Talk to Mutant Rat at [1,-17].
4. Defeat 1× Mutant Rat in [1,-17]
5. Return to Underatlord to tell him what happened.
6. Talk to Adviser Arky at [1,-20] to finish the quest.