IIRC they are something you gotta pick up off the floor in the dungeon, they arent drops from mobsWhere can i find spider eggs?I will have killed 10 spiders but still nothing
EDIT:
used the search bar and found this line from another post
•Once you have gotten her pregnant, it will take 1 weak (7 days) for her to lay a cluster of spider eggs. (You will not get an alert to her pregnancy, just keep an eye on her stumach)