As the name suggests, it's a curse manipulation technique that allows one to control Curse Spirits as if they were shikigami, freely commanding them.
Geto Suguru, this former special-grade sorcerer possessed such a technique, and after years of accumulation, he subjugated thousands of Curse Spirits.
Among these Curse Spirits, there were no shortage of those evaluated as special-grade beings.
Therefore, this former renegade special-grade sorcerer single-handedly recreated the hyakki yagyo from folk tales, causing thousands of Curse Spirits to invade the city, prompting the entire world of sorcery to unite and exhaust their strength, ultimately exorcising these many Curse Spirits.
If this former special-grade sorcerer had made a move, then today's events could be explained.
