It doesn't affect game play that much; you just have to keep your
garrisons small and your armies in the hands of necromancers. Which
makes it harder to exploit the "beats in garrisons don't die" bug. And
that's good.
> Pretty much like immunity from vision
> (btw why can't you cast thaty on a city).
Probably you can cast immunity from vision on any "character". The
design reason for immunity from vision was to keep visions from
trivally locating nobles, plus to give priests a global way to compete
with each other. Cities can be easily spied on using stealth nobles,
so there's no huge difference from allowing immunity to be cast on them.
-- g