“The unicorns are proving nothing if not… predictable. There was one, however, that wanted to look through my artifacts. She decided to borrow a tome: the Contagion Apocrypha.”  
“Ah, excellent choice!” Solon said approvingly, standing up fully as he finally gave the Sorcerer his full attention. “I alwaysh liked that one. Lotsh of fun. How did she take to it?”  
“Evidently she and two other mares made to study the tome in her quarters after curfew. Security teams were alerted by their neighbors, who were awoken by the panicked screams. By the time the response team cut through the layer of hardened mucus that had sealed their door, they found the ponies unconscious and infected. They have since taken to Nurgle worship quite enthusiastically.”  
“That’sh wonderful!” Solon said brightly. “It’sh about time shome of them turned to the darker powersh. I wash shtarting to think they really were immune or shomething. What are their namesh?”  
“Poison Kiss, Rot Blossom, and Breezy Blight, Warsmith,” said Serith.  
Solon was silent for a few seconds. “They changed their namesh after they were marked?”  
“No, Lord. Those were their names before.” Serith paused. “In retrospect, we probably should have seen this coming.”