Three Hundred Times of Infinite Reincarnation, I Have Been Playing the Role of Dean

I opened my eyes and found half a human finger in my hand. The system punished me for being a "bad-mouthed" person, and I could hear everything I said. The nurse has no face and five holes. Dean's stomach is full of teeth. One of his teammates counted on his fingers, another grinded his teeth and brushed, and another tried to become invisible. They don't know - I have been reincarnated three hundred and sixty-four times. The dean puts one silicone finger in each round and I burn one in each round. This time, I poured fuel into the prosthetic finger. The elevator door closed and the dean exploded. When the door opens again, there are three hundred and sixty-four mirrors outside. On every side stands "I". Speaking at the same time: "Welcome back, Dean." ——So, who am I? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.