It was said that the one who understood you the most was your enemy. This saying was true. You might not notice your own flaws and habits, but your enemy would notice them. They would understand your first flaw and every small habit and turn them into weapons against you.
This was the case for the giant spirit clan and the world of a hundred treasures. From the beginning of their cultivation, the giant spirit clan would treat the people of the world of a hundred treasures as their imaginary enemies. In addition to the normal trials, they would spend more time understanding the people of the world of a hundred treasures and come up with all kinds of ways to deal with them.
In fact, the people of the hundred treasures world and the giant spirit clan were the same. They would try their best to understand the people of the giant spirit world and treat them as their enemies.