It appeared abruptly and indeed seemed out of place, but Song He and Yuan Xi were both the picture of calm.
They had already braced themselves for the possibility of strange creatures or monsters here, especially since the exterior was so abnormal, not to mention the interior.
Besides, it seemed to have become an accepted practice for Buddhism to construct prisons beneath their holy sites to suppress demons, and virtually every larger Buddhist monastery suppressed numerous odd entities to some extent.
The Wisdom Temple, a sacred place of Buddhism, was particularly renowned in this regard.
Beneath it, it was said that over a thousand monsters were suppressed, including some capable of Immortal Ascension and even at the Refining Void level, analogous to sitting atop a volcanic crater.
If the monsters escaped, they would be the first ones to suffer the consequences.