*reads page again*
Three times? Wow... okay then.
Well, Permanent Enchantments are going to be thin on the ground, I think.
... but then so are Artifacts.
No I can't imagine that a couple of Autumn mages with a mana site and business between them are going to care much about putting 36 Illium into a permanent buff. But some business owner somewhere who has never been closer to an Autumn mage than a guy he met at a party one time... he might be interested. If it only gets cast once, make it count, right?
They are worth it, but they are going to be RARE... as the right ones can be far more robust than mere items:
I'd point out that the only spell that would break that permanent Rivers of Gold is another Enchantment cast on that business (not on the Character, Region or Empire) and that the willing participation of the Owner is required to Enchant it.
Curses wont cut it, nor can anyone knock you out and enchant you while you're asleep.
If it weren't so darned expensive I'd be shocked that there were no Verdant Bountry'd forests or Sular's Promised fleets at time in. And need I suggest ancient and powerful Covens with "Standing at the Threshold"?
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By devaluing 1 ring of Illium, it also ups the likelihood that Potions requiring Illium will see the light of day.
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Not to say that I wouldn't like it to be cheaper, but the permanent-enchantment industry will need to be more of a Luxury good than we first thought/hoped.
Lets see how it gets used in play...