As I was reading all the new announcements and the surrounding hype about undead, it kind of struck me that no one mentioned overall balancing of undead and other unnatural creatures in some fundamental respects, but rather the discussion tends to center around the less important details of undead.
(I know this is DF and is prone to insanity, but losing isn't fun without being able to give it a decent shot at least).A bit vague, so let me elaborate: generally in story themes including undead (and in other games) undead may be raised 'naturally' because of evil areas or monoliths or certain kind of deaths, but rarely to be anything more than a small nuisance, not a coordinated menace. It takes a (great) necromancer to really terrify a civilization. But if the power to raise found corpses is unlimited, we have a problem, and undead overtaking the world could become boringly common. Basically, the power to raise undead (and that of viral spreading) I see as a force pushing in a certain direction. There should be plenty forces acting against it for balancing and interestingness' sake.
Some include (which I'd like to see elaborated on):
- The knowledge of (more than just dabbling) necromancy is rare (seems to be covered)
- It takes some sort of energy or mana to perform it (and some individuals or races have a natural affinity with certain kinds of magic) which can be developed but must essentially be limited by some (preferrably natural-seeming) effect (like that an individual can channel only so much power w/out damaging themselves etc). This may cause some necromancers to grow greater than others as they discover deeper secrets.
- Along this vein, it should require 'energy' to sustain 'unnatural' undead somehow (so a necromancer or lich has a reach limited by his or her power for eg.)
- There are 'forces of light' at work. Priests and stuff doing holeh magicx0rz. Dieties of light intervening. Amulets. Hey how about plain sunlight being deadly to any undead creature not imbued with enough magic?