If Morrigan isn't at the fight though, the DR still works. So it seems that distance isn't too important. The archdemon's spirit seems to 'prefer' a new conception to a fullgrown grey warden, so if there's a pregnant Morrigan somewhere out there, the warden is safe to take the killing blow.
I imagine it would probably still be the case that the archdemon would prefer the new conception to a months-old foetus,
so as long as the DR had been done, Ahria's foetus wouldn't be affected. (ETA: Thinking about it, the dark ritual also doesn't take place without the warden. Either the warden does it, or persuades Alistair or Loghain. So would there be a DR at all if Ahria had left?). But if it hadn't been done, and Alistair or Loghain took the killing blow, then presumably Ahria's foetus would turn into the godbaby that Morrigan had planned.
But ... that's all probably academic, because (a) the archdemon might not be defeated without the warden and (

Morrigan would be bound to know about the pregnancy and have some other plan up her sleeve if the pregnancy might be a threat (possibly to do with stopping the pregnancy, or even kidnapping the baby after birth - but most likely the first I would think. And the warden would have no idea at that point).
As for what the DR does, I imagine that it's about the conception itself, so forget what I said about that above. What draws the archdemon's spirit is the taint (from the warden's half of the conception) and the fact that it's a new conception, not the ritual, I don't think. I think the ritual is just to make sure that conception happens at that point - something that would be very unlikely otherwise.
(I haven't checked anything up, so feel free to correct me on my 'facts'. I can't remember what the archdemon's spirit is called, for start, and I know it doesn't actually 'prefer' anything, but I think you know what I mean

. And thanks for bringing it up! I enjoyed the story, and it raises interesting questions).
Modifié par Sannox, 24 juin 2010 - 07:13 .