Of course, the required spiritual power isn't a lot, but it's still necessary, similar to about one percent of Ye Tianfan's spiritual power.
And about one percent of Ye Tianfan's spiritual power is approximately equivalent to the entire spiritual power of someone at the third or fourth layer of the Wanxuan level.
Therefore, the spiritual power required for such an array may not be much for the strong, like a drop in the ocean, but for the weak, it's equivalent to everything they possess.
Surely this array suggests that only the strong are qualified to enjoy what the weak have to train hard for, become strong, and then come to enjoy.
There are even many other similar massage arrays that can only be enjoyed after one becomes powerful, because the spiritual power required, although not much for the strong, is minuscule even for someone like Ye Tianfan.
