So I remember reading a book a while back, but for the life of me I can't remember its title.
In the book when people become of age they create some type of stone or something and they add it to a item/object and it turns into something useful like a creature or something. The MC is a male.
His's mothers spirit creature/thing is a water jellyfish type of thing.
Also later on in the book in a valley he practices he finds a portal or something. He convinces his parents to buy the valley so they have the exclusive rights to the valley.
