Illusory Aegis was a Skill I had my eye on for a while.
It wasn't something I had thought much about until I acquired Mana Corruption since it required magic energy to use, but now that I did have that, I considered it more carefully.
As the name implied, it was a defensive ability, one that would supposedly summon a shield of magic energy to protect me, the strength of the shield scaling with my own magic energy and I suppose the Skill's level.
Best of all, it was cheap at only 1,450 World Stability to purchase.
On the other hand, I was also considering levelling up Sneak.
Lockpicking was something I, frankly, didn't much care for, but Sneak was useful.
I did have the Draconic Shadow, but as was evident with the Black Fang last time, there was still a possibility that people could find me.
In hindsight, I realised the way they found me was through magic detection. Joádin also said that was how he found me―by sensing the Imperial City for unique magic energy signals.