During the first duel for the Star Tower's promotion duels, Lin Yuan had suffered due to his insufficient spiritual power. Therefore, Lin Yuan put extra priority into the usage of spiritual power in combat.
As an all-rounded source-type lifeform, Lin Yuan would naturally be using the Source Sand frequently during combat. If spiritual power consumption could be reduced during combat when using the Source Sand, Lin Yuan felt it would be much more useful than to increase the Source Sand's attack power.
Before Lin Yuan enhanced the Source Sand, he had already tried using it. He already felt that when he was commanding the Source Sand, it felt just like a part of his body, and it was very smooth. Therefore, what would it be like if he chose the exclusive skill, Sand Control?