This question is from the Timeline of Athas (TOA). How long was Borys’s rampage? The TOA has these 2 entries:
164th King’s Age
-Desert Vengeance FY -2025
…Borys’s transformation causes him to become temporarily insane, beginning a century of rampages across the land.
165th King’s Age
-Wind’s Defiance FY-1946
Borys emerges from his insanity and learns Rajaat’s prison is on the verge of collapse. Soon after he collects a levy of 1,000 slaves from each sorcerer-king, using their lifeforce to reseal the First Sorcerer’s prison on a yearly basis.
That is only 79 years, not 100.
I could move the second reference to FY -1923 the year of Dragon’s Agitation, which could have some significance because it mentions the dragon. Borys emerges from the insanity and is agitated to learn of Rajaat’s prison being on the berge of collapse.
Or FY -1924 the year of Wind’s Reverence, which could have been mistaken for Wind’s Defiance (FY -1946).
Any other suggestions?