Start the Mental Hospital, I Draw the Rules in the Abyss

My name is Ren Feng, and I woke up as a patient in a mental hospital. Until I was stabbed into the heart by that blood-stained knife coin—— The abyss opened before my eyes. Those with authority there hunt for life cores to extend life, and there are giant beasts sleeping in the shadow of civilization, and I have become the "key" in their mouths. The wheelchair is my prison and my throne. They want my pen, my life, the secrets of my soul. OK. Then I will use this money to draw a tomb for them. Also draw a new rule for this cannibalistic world.