Couriers Don't Need a System to Save the World

Courier Zhang Yuan picked up a ring during delivery. On the day he put it on, he saw with his own eyes a three-meter-tall monster coming out of the wall. Everyone else was frightened, but he was the only one who discovered that the monster was caused by his ring. What's even weirder is that the ring finger, middle finger, and index finger of his right hand suddenly become hot. As long as the three fingers are moved, the monster will lie down obediently. But peace only lasted three days. On the fourth day, a crack opened in the sky above the community, and a dark demonic tide surged down. Zhang Yuan looked at his three hot fingers, and a voice rang in his ears: "Devil-drawer, you still have two chances to exchange for peace." - Only then did he realize that every time he used his three fingers, he had to exchange it with something of his own. The first time I changed my eyesight. The second time I changed it was the memory. The third time... What will you change? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.