This Blackstone is indeed very useful. Du You had to admit that although it is somewhat unconventional, its effect is unparalleled. Even if it means adding some seventh-tier Undead Mages, it would still be a boost for Earth.
It's worth noting that with the rise of Du You over the years, many people have begun to learn from him.
Not to mention the most common types are Spellcasters and Summoners among Professionals, and apart from that, the powerful Undead Summoning abilities Du You demonstrated multiple times in the recorded materials left behind have attracted many to become Undead Mages and similar professions.
These years are very different from when Du You was rising. Back then, ordinary people found it very difficult to come into contact with the world of the Professionals. But now, even some data of top-tier Professionals have been made available for everyone to view and study.
Among them, the emerging strong figure of Du You is especially well-liked.
