Sage 54's explanation was cut short; he could only deviate.
The next moment, he deviated from Sebastian's life to telling him about the war. According to him, each double blast of the alarm was an indication that the enemies were back, that the Ancient Cthulu was back.
For the past 4 decades, the Myth Realm had been at war with the Ancient Cthulu and his army and the incoming clash will be the 8,919th clash.
The 8,918th clash concluded just 2 hours ago.
As the Ancient Cthulu attacked repeatedly, their advantage grew as the Myth Realm got more damaged. More Sages died, and more Myth Realm folks died, leaving this world more vulnerable with every subsequent clash.
For 4 decades, the Sages have waited for Sebastian's arrival. During this time, they prepared everything according to their calculations that he needed for him to stand toe to toe with the Ancient Cthulu.