Philosopher's stone!!!

It was either the mechanisms were faulty or there wasn't even one, but Sheyan walked peacefully for roughly a few hundred metres. Ahead of him was another large stone door, with a grand and vast ancient epic war picture engraving. It clearly displayed the glory of the country, and its downfall. Once again, ancient archaic hebrew was carved mysteriously in the middle. If Phelps was still alive, he would've understood the meaning:

Door of wisdom.