As Aldrich saw the 99 daggers hovering around Conrad, he realized there was more to this second formation than just its name.
The daggers kept orienting themselves in such a way that, by a combination of reflection and refraction, most of them seemed to disappear. The illusion wasn't apparent to all but to only the target they were aimed at. Here, this target was Aldrich.
Aldrich tilted his head and saw one part of the formation getting visible to him. But then the part he could already see disappeared. No matter where he landed while still dodging the rain caused by the first formation of 33 daggers, he could never see all the 99 daggers in one go. Aldrich's mind again raced as he calculated the position of "raindrops" and the area of collision of daggers based on light sources in the Great Hall.