Within the 200th layer teaching zone.
Zhang Yu sat below the stage, listening to Feng Jiu's lecture, and found that this teacher always gave him a feeling of... hastily completing a task.
The lecture process felt like reading a script, with zero interaction with the students throughout.
Just heard Feng Jiu say: "…The Dao Heart is the essence of the Immortal Path; the higher the realm, the more important the Dao Heart becomes."
"If the Dao Heart cannot keep up with the cultivation, at best, power goes out of control; at worst, one may suffer a backlash, even a counterattack from magic remains…"
As she spoke, a series of images of cultivators suffering backlashes appeared.
Some with distorted thinking going on killing sprees, some whose spirit roots exploded, transforming into flora, and others being attacked by their own magic remains, mana explosions… these images kept appearing.