Quote Originally Posted by bloodtide View Post
What about Weirdstones? They block teleportation within a six mile radius. There is no reason a city can't have a couple of them.

They don't cost all that much, especially when you can wish up 25,000 gold per wish. You could gate in three Effreti a day for a week, for example. Not to mention 'Fabricate' traps and such.
The best anti-teleport defense but you can still get around them without too much trouble. The easiest way to get around it is to just Wish the weirdstone protecting the location you want access to away.