All the three python eggs were eaten by the Garuda, it really was unfortunate. The eggs of high second stage beasts are very precious, especially at this early stage of doomsday. It is one of the best ways to increase an earth realm fighter. The higher the realm, the harder it is to improve. Alex was planning to keep it until the pillars came and breakthrough the Mortal Realm. Didn't realize it became a disaster to the base instead...
Python eggs apparently have a very special scent that attracts all the other beasts, if Alex had known he would not have brought them to the base. Currently, the eggs already are gone, but just like he thought, the mutated beasts somehow were still attracted to the remaining scent. Although most of the beast hordes already have been routed, a small number still gathered outside the base. The dead beast remains made them hesitate and soon after left the place.