The king of the deep caves had been stopped in the tunnel dealing with a build up of soldier ants. He had told Walker and Midnight to proceed and scout since he lacked the ability along with the free golems to do so. With Walker and Midnight away he trusted that he would hear good news soon and put his all in to smashing the heads of giant earth ant soldiers.
"Alright, this is the way to the egg chamber…they're gone. All gone." Walker found that everything was gone. The thousands of eggs he had seen were nowhere to be seen. Instead, he could tell that the earth had just been dug up.