User blog comment:BannedLagiacrus/Elder Dragon Discussion/@comment-31029678-20180227170908/@comment-6050823-20180228001129

That came from Hunter's Encyclopedia 2 originally but is also mentioned in the Hunter's Encyclopedia [reprinted edition] (Page 116). I've been researching some older monsters again, as well as newer ones, to see if I've missed stuff about them (Can't lie, made some newish discoveries).