By Bokuto Uno and Miyuki Ruria. Released in Japan as “Nanatsu no Maken ga Shihai suru” by Dengeki Bunko. Released in North America by Yen On. Translated by Andrew Cunningham. It’s been several books since we’ve had to deal with the revelation that we got at the end of Book One, which is to say it’s been a while since Oliver and his allies have tried to murder a teacher. Good news! We get that here, as the academy’s resident mad scientist is next on the chopping block. More good news is that we also get a lot more explanations and backstory for exactly what is going on. Being Seven Spellblades, of course, it’s complex, and its discussion of Gnostics and Gnostic Hunters is very reminiscent of the battle for...

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