After the resistance movement members left, Amon didn't immediately begin destroying the crime scene. Instead, he summoned many altered beasts, which filled almost the whole room.
Dao Su created these altered beasts at Amon's request. They were not calibrated for battle. They were maximized for one purpose only: burrowing. Dao Su made these altered beasts using the Cryanids as their core components. Through Amon's alliance with the Hyanids, he had no problem securing many live Cryanids for Dao Su. Dao Su used the Cryanids, which were already excellent burrowing beasts, and combined them with parts of other spirit beasts with burrowing abilities.
The altered beasts went to work at once. They dug a hole at the center of the basement. The other beasts lined up behind the ones digging the hole and poured in once the hole was made. Underground, they spread and made a large cavity.
