The one spy that was kept alive returned to the Osted family and reported every information he and his comrades gained. When Walganus and Sagar heard the report they were stupefied. All their speculations were wrong. It was not any known enemy that killed Evior, but an unknown student was the one who killed their one and only heir.
Walganus and Sagar couldn't believe their ears, it was a student that was able to use such a powerful spell. How can some unknown student be so powerful? If he was that powerful rumors about him would've spread long ago. It was like the student called Kretos just appeared out of nowhere.
The report was unbelievable, but when Sagar noticed that there was only one spy that came back he understood what had happened.