As for using power during the ten-year gap of the Black Tide?
It was inevitable, but remember one thing, when carnivores are full, their desire to feed is very low, and they might not respond to the call.
But if called upon multiple times, they will come!
Yet, this was clearly not possible, even the other forces, for the sake of ensuring their own survival, wouldn't provoke the White Orthodox Church.
So it created an illusion that ten years was an inevitable cycle.
In fact, it could always be advanced.
However, the fourth Pope was somewhat different from his predecessors, he developed a special kind of addition that could bind a variety of Cursed Beasts, resulting in most of the time there was no need to utilize the power of the Curse King's Mouth, and over these twenty years, the King of Curses had not appeared, likely for this reason as well.
In summary, the White Orthodox Church, this guardian of the Human Species, was actually just like...
A Shepherd Dog!
