I have a character who needs to hide some things, I could likely use some magical shenanigans but whats the fun in that when I could have a lair!
Instead of going with the conventional cave or underground base I want to do something a bit different, I want to build an underwater base. I have been looking at magic and magic items and the most I've found is some that let me breathe underwater and turn a ship into a sorta submarine like thing.
Is there any support in the rules to build an underwater base that I can come and go from and would be safe enough from underwater monsters? I can use Teleportation to get there and leave so having surface access isn't that important.