Spiderbrood Eggs appear in Mactans' Retreat and Shrine of Elynie. They spawn Spiderbrood at different times in certain waves and, like most enemy-spawning terrain features, will spawn faster if the waves are called before they are timed to start. In Shrine of Elynie, the eggs are created when Mactans descends on the field and covers the path in webbing. More Spiderbrood are spawned depending on how much time Mactans is given to perform her task, and she will always spawn some even when tapped immediately.