Nina walked up-to-the hinged door looking structure which was barely visible because of the duskiness of the swamp, but Nina's sharp eyes caught whatever little light the metallic handle of the trapdoor was reflecting. The trapdoor was surrounded by the roots of the nearby trees which prevented anyone from opening the hatch, but with her sword, Nina easily sliced through them to release the door from nature's grasp.
"What even is that..." Nina whispered to Arnold who was standing next to her looking intently at the old wooden door.
A short pair of worn-out sculptures were engraved on the entrance which was covered in murky swamp marks. Nina leaned in to open the door but Arnold gently pulled Nina back and call forth an automaton to pull open the trapdoor instead.
