He encountered illusions that played tricks on his mind, making him question his decisions and the reality before him.
With every step, Raven relied on his instincts and intuition, trying to discern the illusions from the truth. He kept reminding himself that what he saw could be an illusion but at the same time, the reality itself.
At times, he even fell for it, despite being careful. In one turn, he saw a floor purely made of water. He tapped the water with his feet and the water also rippled, giving him a completely real sensation. However, in reality, there was no water.
At another place, he saw a floor filled with molten lava. Confusing itself to be an illusion like before, he stepped over the lava, only to feel a burning sensation. This was not an illusion but a reality, which prompted him to jump back instantly.