https://www.webnovel.com/book/dead-card_18830157106356305
Synopsis:
Follow Guaracy, a teenager from the Brazilian favelas (slums), on his travels through a hostile universe, where magic made animals and insects powerful and intelligent, forming their own cultures and ancient empires.
A universe where humans form pacts with these beings, thus being able to manipulate the physical and chemical characteristics of the world around them.
Author's note: I always liked more realistic novels, I intend to create a fantastic universe, but that makes sense in itself, without distorting the rules to advance the story. The protagonist will have to use his own effort and intelligence to grow in this world.