Presumed Ancient Ruins

Their prediction, the unearthly thing in the one-kilometer diameter area came from ancient ruins that had been buried one kilometer under thick snow and ice.

Neither explosion nor destruction they did to pierce the floor of the wall which they failed to detect what was behind it. It's a super laser with high penetration power concentrated at one point.

It took a few seconds for them to successfully bore a hole into a deeper area, an area that was so mysterious and sacred.

"Hmm... These rocks mess up any detection ability. Sonar, sensors, radar, energy waves, all disturbed... Troublesome rock." Aizen scrutinized a pebble in his hand.

It was a small rock from the fragment of the rock wall a mysterious place one kilometer below the snow land.