There was no doubt that Grimmjow, the Sixth Espada, gaining the ability to use Resurrección: Segunda Etapa in full view of everyone immediately stirred the once-peaceful Las Noches into unrest.
After all, aside from Coyote Starrk, the top-ranked Espada, most Arrancar had chosen to submit to Aizen because they craved even greater power.
And now, that power was right in front of them.
Though it came with considerable risks, merely surviving in Hueco Mundo had always been dangerous. Even Adjuchas-class Menos could lose their lives at any moment.
Thus, in the eyes of the Arrancar, Hollowfication's Hogyoku was practically a treasure custom-made for them.
Therefore, the other Espada members, including Barragan, the "Skull Emperor," all approached Aizen with requests to gain the powers of Resurrección: Segunda Etapa, or even Resurrección: Tercera Etapa.
As for such requests, Aizen, who was worrying about not having enough experimental materials, naturally granted every one of them. He did not even spare the Espadas' subordinates.
Of course, the price was that the Arrancar army, once numbering over a hundred, had been reduced to just over thirty members. More than two-thirds had been lost.
As for those two-thirds, they had naturally failed to resist the beast-like primal instincts buried deep within their hearts and ultimately devolved from Arrancar back into Hollows.
Following the principle of making use of waste, Aizen did not humanely destroy these failures. Instead, he subjected them to a series of modifications.
He turned them into creatures similar to hunting dogs, controlled and commanded by Arrancar who had completed Resurrección: Segunda Etapa.
Though the Arrancar army's numbers appeared to have declined severely, its actual combat strength had not suffered any loss. On the contrary, it had risen dramatically as Resurrección: Segunda Etapa became widespread.
Even these unfortunate souls who had devolved back into