How in gods name did our fancy magic trick remove the fact that we are deep in enemy territory, with only a single, long route connecting us towards the rest of the civilized world? There is no shadow in the world big enough to safeguard our supply line and any force large enough to threaten us is also large enough to easily destroy any convoy trying to reach us. Keeping the Blood River and Co open requires constant patrols and heavily relies on the fact that the various factions of the Badlands have as of yet made no real attempt to blockade us (and luckily for us Orks and Goblins don't tend to be very good at that kind of lengthy strategic warfare, at least intentionally). The land that convoys have to cross to reach us is famous for swallowing entire armies and nobody has ever managed to pacify it for any length of time. Sure we are probably in no danger of running out of food and water but that generally doesn't seem to big that big of an issue when it comes to besieged Karaks anyway and even then so far at least we seem to be heavily reliant on suppliess from the rest of the world. And sure, there is the possibility of shipping stuff via the air but that ignores the fact that its both expensive and that air travel isn't truly safe either, warhammer has a lot of creatures capable of flight like for example wyverns who shouldn't be that uncommon in our region.
Also you happily ignore that so far we seem to have made no attempt to even reclaim the deeper areas and mines of the Karaks (aka the truly productive areas) and it is again holding those that tends to be so disastrously attritious for the dwarves.
