A Joke.
Leonel asked himself a very simple question. What was the measure of success in this place in the rawest terms? He was able to find the answer by making one simple assumption: the goal of this first phase was to swallow Beast Crystals and strengthen yourself.
With that assumption made, the answer was obvious. The measure of success was how many beasts you could kill.
In that case, what Leonel had to do was even more obvious: kill as many beasts as he could, and even more ideally than that, kill them all!
This was where the importance of the fact that this place was finite came into place. The fact that there was a finite amount of space meant that there was a finite number of beasts. And if there was a finite number of beasts, then logically, to perfectly clear this region, one had to kill every last one of them.
So then the question became how could Leonel use his unique advantages to force this end result?