*Vooo*
As Sato pushed the gate open, the two doors moved inwards slowly while making a grating sound like a door that hadn't been opened in years.
Maybe due to that, the two sides of the gates, which acted as individual doors, didn't swing open but stopped halfway, forming an opening enough for 2 people to walk in but maybe due to poor lighting, most of the interior couldn't be made out. No matter the amount of force Sato applied, they refuse to fully open.
Realizing that there was no point in forcing them wide open, Sato walked through the opening, going past the doors and into the dark chamber.
"This is?"
As Sato stepped through the door, he felt the environment changing. This feeling wasn't that resulted from his location being changed by a teleport spell but instead was an inherent change in the environment. The mana here was much thicker than in the labyrinth. It was even thicker than it was in the outside world. One could even