Reiger didn't know anything about the Prison Gate Border.
His understanding of cursed objects was limited, his knowledge of curse tools was also very limited, but he was quite familiar with sorcery and Curse Spirits. In particular, after several months, he had mastered dozens of sorcery techniques and had been continuously developing and researching them. His understanding of techniques was no weaker than those of the special-grade Curse Mages, and perhaps even exceeded them.
Especially after being able to freely unleash [Black Flash], Reiger was getting ever closer to the core of sorcery and cursed energy, making it easier to understand. Coupled with the fact that his control over cursed energy had quietly surpassed that of Gojo Satoru, who possessed Six Eyes, he could apply cursed energy and sorcery more precisely. It could be said that in these few short months, Reiger's achievements in the sorcery system had reached a staggering extent, unmatched by few in this world.
