Gazze steps forward and walks towards the door, while activating his magical senses to analyze it. He also turns his gaze towards the walls of the hallway and around the door to see if any magic extends along them. He also takes note of the general construction of said walls and what materials they are made of.

Spoiler: Actions
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Casts Detect Magic and makes a Spellcraft check (1d20+15)[34]. Also, a Knowledge (Engineering) check (1d20+15)[25]. Both rolls take into account the -2 penalty mentioned earlier.