Hell's Power would cause the appearance and combat attributes of the City Lord to change, while Hell Knowledge suppresses the thoughts of the commoners and causes the spread of Demonic Knowledge. Hell's Summoning, on the other hand, directly summons a large number of the Undead and demons.
Instructor Ding forced the City Lord to turn into a Death Knight using Demonic Power, mainly due to the frequent use of these three skills.
So once used, it would be noticed by Xia Mi, leading to irreparable consequences.
But Hell's Vision and Hell's Bounties can be used!
These two skills will not change the City Lord's appearance, thus not raising Xia Mi's suspicions directly.
Therefore, players can secretly use Hell's Vision to view the attributes of hostile units and use Hell's Bounties to grant certain skills to other NPCs.
