C172 Infused venom

"Gu poison is actually a type of insect poison. Use a few worms that you can't find like fungi to infect you. Of course, this was an early version. Because these worms were already extinct, they had become many times more extinct. Thus, by passing down the Gu poison line, it had become a fungus poison. In other words, he was transferring some of the poisonous fungi into his bloodstream