9

The number 9 in Yxin, Lylan, Netheran, and Witheran culture is considered a bad and unlucky number.

Yxin
What began the belief of 9 being a bad number was connected to "369". Metaphorically, the 3 is the least bad, the 6 is worse, and the 9 is equal to apocalypse. The 9 in 369 was the highest and supposedly most unlucky, and the peak evil point in the number altogether until the 9's reign ended. Several years after the widespread of 369, it was then generally considered that 9 was a bad number.

Lylan
Bone Withers and the number 369 were connected to the origin, since 369 is considered a bad number combination throughout many cultures, or as "the number of evil". The Bone Withers destroyed a Lylan city in the time when the Yxins ruled still, and they kept screaming "THREE SIX NINE!". After this event, 9 was spoken as the number of evil.

Netheran
Netherans believe that 9 is a bad number for a different reason. Whenever somebody was to be taken to court, their punishment was usually repeated 9 times. For example, if somebody was to be whipped, they would be whipped 9 times as part of their punishment, or kept in prison for 9 years on average 9 times (totalling to 81 years in prison).

Not every Netheran considers 9 as evil, but usually the ones who have connection or have been to prison or have had punishment repeated 9 times over. All numbers below 9 except for 6 are considered good numbers, since they are less than 9 and mean less pain in a punishment.

TBC