Egg-Laying Fey. Attercroppes are hermaphrodites and reproduce by laying eggs. They typically lay hundreds of eggs at a time, the eggs hatching after a few days, when the young attercroppes are abandoned by their parents. Young attercroppes resemble tiny green worms for their first year of life, until they develop their poisonous aura and magical abilities. Few attercroppes survive to adulthood, but those that do become a blight on the natural world.