The twins deluded themselves into thinking that they were the blessed child of the heaven, destined to achieve greatness
In that aspect, even Stone Head was better than them. While the fortune aura he received from the Savage Beast Realm is only maybe enough for the Waterside Tribe to be the strongest out of the several nearby tribes, that is the limit of his fortune aura. His fortune aura was far from enough to give him the ability to turn his tribe into a big tribe
"Brother, can't we just use that jade? Aside from teaching us how to write and read, the crystal ball also told us that the jade is special and could increase our rank instantly!" Collosam replied as studying magic with the help of the book was extremely hard
In fact, if not for the fortuitous encounter that they had, they might not even reach the Junior Rank their whole life