Volume 1 - Chapter 4.23

The first two pillars nearest to the entrance visibly cracked right in front of my eyes.

"That's enough!" Kronos yelled to August. "The basement will collapse if this goes on!"

I immediately ran to Kronos, who was repairing the stone pillar.

"Kronos! Can't you open up a hole out of this…!?" I asked.

"I already did." He told me while nudging his glasses. "The ground, the ceiling, the walls— they were all blocked by that black wall. I can't alter any earth materials that I've never seen or studied before, and I still can't activate my magic."

"…So we were trapped?"

Like a box.

“…What… is that…?” Kuroyuki murmured.

Tracing her voice— I find a silhouette of a person climbing out from the hole.

What on earth is that… Even dad’s encyclopaedias had no records of such an eerie thing.