Re: I now know why I did what I did...
Mordane76 said:
The reason the spell uses the permanent duration, instead of the instantaneous duration of the Life seed, was because Life does not specifically cover the application the spell entailed.
The way I see it, the Life seed is all you need. From there, it's just a question of the initial Spellcraft DC, but no other seeds are necessary. If another seed had to be applied, the only one that would qualify would be the Heal seed. None of the others are really applicable. Ask yourself this question: What does the spell do? It extends life indefinately. The keyword there being "life". What's the seed? Life. That's it.
Since Xeoble isn't the one casting the spell anyway, then it doesn't really matter what the Spellcraft DC is. Really, the only problem that seems to be present here is the duration, and even then, its only because you want it to be dispellable. Don't get me wrong though. I don't think its a problem that you want to change the duration so that it is in fact dispelable. You're the DM. You do what you have to until you're comfortable with it, and I don't have a problem with that either. The only thing that was wigging me out was
how you were modifying the spell. Modifying the spell isn't a problem.
How you modify it might be, if it doesn't make sense.
Just keep in mind that if the spell is dispelable, then it isn't really permanent. Because of that, you shouldn't raise the Spellcraft DC too high, but that's only important if Xeoble will be casting it one day, or if you're charging him gold or services for it.
While entertaining, I don't think it would work that way. I don't see Immortality as magic preventing the biological effects of aging as you continue to age on a temporal level. Quite simply, I see Immortality as completely stopping aging, meaning you just don't age anymore. So, even if it was permanent, and you were exposed to antimagic for 10 rounds, well, congratulations, you just aged 1 minute. That's just my opinion though. 
