Hunter x Hunter System in Against The Gods
Chadero is a genius only seen once in history.
With an IQ of 349, he got a full-ride scholarship to Harvard at the age of 10; became a member of the Illuminati, and won at life.
But...
Chadero became bored of the world and shut himself in; reading mangas and novels all day every day. However, that soon came to an end when he died at age 16, after his brain couldn't handle his IQ.
"God. How about a game of weiqi?"
After beating God at a game of weiqi, Chadero was reincarnated in ATG with Hunter x Hunter System.
"So this is how Netero felt?"