(It's possible, the Skeleton Undead uses soul fluctuations to transmit information. After swallowing the Parrot Candy, you can quickly grasp the corresponding fluctuations by reaching out and touching its Soul Fire.)
The confirmation from the strategy guide undoubtedly gave him peace of mind.
Zong Shen didn't hesitate; learning the way of undead communication was all gain and no loss for him.
In the future, when he develops the Burial Ground and gathers the Demon King's Secret Order, he will surely be able to command the Undead Army.
By then, mastering the way of undead communication will facilitate his military maneuvers and strategies.
Moreover, Richardson, who roams near the Burial Ground, remains a significant threat.
And the strength Richardson has displayed is quite mysterious.
He's at least beyond the level of a Tier Five Knight, otherwise, he wouldn't be able to chase the Dragon Descendant Knight Order all over the place.
