* Fixed common misspelled names from iRO and other typos.
* Implemented NPC_REVERBERATION (some parts are from https://github.com/idathena/trunk credit to @exneval) Credit to @RagnarokNova for some texts correction and for the monster spawn ([source](https://rathena.org/board/topic/104496-nightmareish-jitterbug-episode-143/)) Credit to https://www.divine-pride.net/ for the monsters datas.