I'm taking the plunge (pun intended) and having a go at writing my own aquatic based adventure. I intend to use settings of a port, a ship, underwater and a hidden (air and water) cavern.
I've compiled a decent long list of NPCs and Monsters that would work well in these settings, but I'm unsure about the underwater part of the adventure.
What options are available for me to give my characters the ability to breath underwater?
The only things I can think of at the moment are:
- some kind of magic.
- some kind of invention (a primitive aqualung)
Does anyone know of any other options that I may be missing?