As the lights in the compartments lit up one after another, the game officially began. The mechanism slowly rose, took a slip of paper from the bottom of the lantern above, then descended again until it was over the compartment. A mechanical arm-like part of the mechanism carried the slip downward. An opening appeared in the ceiling of the compartment, just large enough for the mechanical arm to enter.
However, perhaps to make it easier for them to observe the mechanism's direction of rotation and devise their own strategies, the compartment ceiling was transparent. It did not look like glass, but more like some kind of highly transparent resin material. The opening was right in the center of the compartment. Perhaps out of fear of sound leaking, the opening was very small. The mechanical arm only stopped above it and tossed the paper down.
Superman went to the center of the compartment and picked up the slip. He turned to Batman and said, "What do we do?"
"Go out. Clockwise." Batman sat in the corner of the compartment, recovering his strength, making his words as concise as possible. Superman did not ask too much either. He turned and looked around, found no pen in the room, and simply beckoned to him.
He pointed at his own clavicle. Superman's eyes widened as he said, "What are you doing? Your wound was about to heal..."
"It won't heal, Clark." Batman shook his head and said, "Dip the tip of the iron spike in a little blood to write."
Superman was clearly unhappy. He pouted, but he also did not want Batman to waste energy arguing with him, so he could only walk over in a huff, dip up a little of Batman's blood, and casually write a couple of strokes.
"How do