A friendly IC question will net you 3 locations that someone at your level could have gotten detect invis magic (pills or potions) that you can buy/barter for. There are also some that are free, if you're willing to spend the time gathering them.

The hiding in the shadows thing is definitely difficult to deal with, but shouldn't really be an issue if you're in a wilderness area (though then you have to deal with camoflaged folks).

FWIW, often I think when someone gets killed they presume that there's no RP reason for the character to do so. And sometimes there maybe isn't. But I know for a fact that this morning your character (a dwarf) was killed by a member of a cabal that has, as one of its idealogical points, a severe dislike (even hatred, on some members) of the dwarven race.

Just one example.