“ If you want to add a 'supernatural' touch to your campaign, define the rules of magic and the universe. Make your players comfortable with those rules. Then your new supernatural creatures must then break those rules.”
“ 'Look, lad! You see the streak of glowing green off the larboard bow? Them's the bright waters!'
While the lad peered intently at the eerie glow, the old salt continued. 'Entire ships have been lost to the Bright, lad, for once you let it surround you, you'll never touch land again!'”
“ The religion believes in reincarnation, but that you will be reborn in the past. People of today are those re-born of tomorrow, with some discarded as trash. The most pure will be eventually reborn in the mythical paradise-like past, where people lived for hundreds, or maybe even thousands of years.
This goes nicely with beliefs into foresight (you know a little about the future because you have been there), but also to many complaints of how things are going always from bad to worse.”