"Let me speak about the skills first.
The most important criteria for the quest on your shoulders is to be invisible to the Ego of Magic, which is essentially being undetectable to the Mana Current in the continent. The Crowd Conceal is a hidden skill that enables you to blend in with a crowd. Your Undead constitution will be veiled by those around you and the number of people you have with you determines the extent of your stealth.
Due to this skill, you should be able to use Arcane Glyphs while being one with a crowd without repercussions but don't jump to conclusions.
