Channeling the Waters of the Heavenly River to irrigate the Divine Tree was a crucial part of Shen Yuan's plan.
However, the potency of Rain Calling Divine Ability would inevitably be hard to conceal. Undoubtedly, invoking the Waters of the Heavenly River ahead of time would reveal his trump card to the Spider Demon.
Thus, Shen Yuan planned to use the Rain Calling Divine Ability to suppress the three Great Demon Kings and at the same time irrigate the Divine Tree, achieving two goals in one move.
If not for this intention, Shen Yuan would not have chosen to confront the three Great Demon Kings head-on.
For Shen Yuan knew too well that without the Rain Calling Divine Ability, a direct face-off with these three Return-to-Void Stage Great Demon Kings would undoubtedly lead to defeat!
At this point, the Sun Fruit on the Divine Tree was becoming even more radiant, as if it could detach from the tree and turn into a Great Sun at any moment.