Alec had been able to see the names of the newly summoned undead creatures only because he had used the analyse skill on them.
Otherwise, he would have been just as clueless as the other mages present, but from what he had discovered when he had seen there description with the analyse skill was quite alarming.
The skeletal knight on horseback seemed to cause a change in the skeleton army as they no longer attacked and retreated back.
This sudden change caught the Swedish city guards off guard, as it was the first time they had witnessed such a thing as the skeletons have never retreated before, and seeing the Tier 4 skeletal knight at the back of the horde of skeletons made them concerned.
They knew things were about to become ugly if the Lich was about to have a Tier 4 deployed against them so early in the war.
Additionally, it was their first encounter with the skeletal knight, leaving them unaware of its powers or weaknesses.