Tumblusen ordered you to find out what the Kaidan Krall were planning. Following his orders, you eliminated the dangerous Kaidan Krall and obtained their plans. The plan, however, was written in an undecipherable secret language. So you asked Mabangtah for help. He translated the secret markings for you. Afterwards, you eliminated more Kaidan Krall. After you had completed you mission and reported to Telemachus, he became worried about the looming threat.