บท 997: Sneaking In (2)

The three halls were around seventy meters tall each, and they towered above the other buildings in the area, making them particularly conspicuous.

"Poison Experimentation Hall, Sparring Hall, and Compendium Hall... The first two are areas where poisons are frequently utilized, so no matter how they are cleaned, there are bound to be traces left behind... As for the Compendium Hall, considering that it is a location where books are stored, the usage of poisons should be restricted there…"