"...Hmm..." I walk through the "city" around my mother's castle. My magic is so compressed and hidden that you can only sense my presence if you're within a meter of me. With this, I can explore without them fleeing from me.
'Urgh...this place stinks...' I'm on top of a strange "house" looking around. There are many nests with eggs. As it happens, lots of monsters lay eggs. Why? Because eggs are biologically the best choice for survival.
Normal gestation, with the baby in the belly, forces you to carry your child, hunt while getting slower and weaker, and defend the baby in the womb from threats. With eggs, there's no weakening of the body.
You don't have to go out hunting with your child, and with an egg, you can abandon them and flee if an emergency arises. This made many species focus on laying eggs.
After all, if you're hungry, why would you waste time chasing the mother when her eggs are enough for a meal? It's just basic logic.
