Definition
### Layue Shiba (腊月十八) — The Calendar Monster This is a uniquely terrifying folk-horror concept: a monster whose identity is tied to a specific date. Literally named "The Eighteenth of the Twelfth Month," it resets its entire existence—appearance, abilities, weaknesses—every year on that day. This makes it virtually impossible to prepare for. It's a brilliant subversion of the "boss fight prep" trope: normally, a cultivator would research their enemy, but here, the information is *inherently obsolete*. Jingxin's casual "just remember it's red" is both a hint and a hopeless shrug.