Originally posted by DeMasked:

Wraiths can show up during the day and haunt random shacks that you might find in the swamp. They have a rather large aggro range.

In all my games I have never seen a wraith during the day at any building. Only at night.
I actually enjoy the swamp so I do spend a lot of time in there and poking around.

Unless they changed things in recent patches and this is something new? IDK

I do like the changes I am seeing in the black forest crypts. Fewer mass core rooms and many more individual ones. Overall seeing fewer cores but still have way more than enough. So who knows what they may have changed up.