Pentagram
Adam and Veronica had successfully finished recording the important details, and the group began to descend the stairs. Surprisingly, they didn't encounter any traps on their way, even though there were as many at the entrance as there were stars in the sky. However, this didn't make them lower their guard, as the absence of traps could mean that things would only get worse. And they weren't far from the truth.
"Is this a magical castle?" Sierra mumbled, standing in front of another colossal door. She tilted her head to the side and looked at the pentagram drawn on the door's surface. Squinting, she tried to decipher the basic components, but it was beyond her. She reported with a sad tone, "Darn, I can't recognize it! I've explored plenty of magical circles and ancient pentagrams in my life, but this one baffles me. It seems to have 'lock' and 'self-restoration,' but beyond that, I can't make heads or tails of it."