Umm, what do you mean exactly? I was thinking players just say how much essence they'll be putting into specific projects when they decide to do so.
That is one system that will work. If everyone uses a different system, I will be completely confused
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Growing planet: Variable on size of the planet. ~Maybe 20-40E for each earth size (Creation etc). Once again, the planet will have enough room for everything without needing to grow.
Millennium: 10-30E
Keep in mind that with % growths, things get absurdly big absurdly quickly.
Yes: The answer was it varies with the size.
[Torus planet:20-30E, same as a normal habitable rocky planet, assuming it is relatively the size of Earth. +4-10 for every extra "earth" size. (Etc, etc bonuses)]
Putting all price checks in OP: I don't think that is a good idea. We are two days in and it would already be swamped to the point of being useless for the intended purpose, and that is just between you and Andres
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EDIT: Kept forgetting to ask this. What do the price ranges like e.g. 2-4 for portal magic system mean? You can spend the minimum of 2 essence for a barebones crappy product, up to the maximum of 4 for a deluxe model with all the bells and whistles? Or does it mean something else?
A price check with a - means that it is random and rolled between those two numbers. 2-4E means that it could be 2,3, or 4 essence depending on how lucky you are with your rolls.
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Gear-shaped world with sun capable of supporting life: 35-55E for Earth Size (Creation ETC)