PESTS IN THE STORAGE AREA
You will be allowed to start this quest after you've finished the second assignment - Ties of blood and magic. Go to the second level of the tower and find Leorah (Magi Origin M1, 9). During the conversation you'll find out that she's having problems with the spiders in the caves and you can agree to help her. Leorah will give you the key which you can use to open a nearby door (Magi Origin M1, 10). Before you start the mission make sure to wear mage's robes given to you by Irving. You'll soon find yourself standing in Mage Quarters, Caves (Magi Origin M3, 1).
Head South and then choose one of two available corridors. I wouldn’t recommend moving too fast so you won’t be fighting more than two giant spiders at the same time. There are also going to be a lot of crates in the area and it would be a good idea to open at least some of them. The game will inform you once it’s safe again and you can return to Leorah (Magi Origin M1, 9). She will tell you that she now owes you a favor.
Once you’ve finished the assignment go to Leorah and remind her of a favor. Return with the signed form to Owain (Magi Origin M1, 7) and in return you’ll receive the rod of fire and also go back to Ties of Blood Magic.