“Advanced Course on Gray Magic” by Librius
"This is the second book which reveals advanced practices of bizarre Gray Magic Current. This Magic Current existed in XXth century and almost disappeared, though it had some interesting practices together with some dubious ones. This book also includes some additional pratices, which are complementary to those of Gray Magic. The additional practices are very rare, very simple and very effective, but they are more Dark, and must be used with great caution."
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