The achievement "The Sea is a cruel mistress" is simply described as "Drown". I guess I have to get into water, but I don't see how.
I can't walk into it, I can't be moved by a monster, and teleporting always make you land on solid ground. How am I supposed to drown?
Best Answer
A way to do it is to get the vampirism skill tree. The fifth skill in that tree, Transylvation, allows you to turn into a batty, which can fly over the water. You can then wait until the spell ends, and you'll fall into the water, dying instantly.
Example: