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OPG
2015-05-23, 10:03 PM
So I'm working on a Fiendbinder boss with my GM, and I'm having a bit of trouble creating an army of bound fiends. Namely, I'd like to use fiends other than the ten explicitly listed in the PrC. Which leads me to my question: Is there any formula/pattern used to determine the gold costs of each fiend? The Truespeak DC formula is 15+(2 * Fiend's CR), but for the life of me I can't figure out how they determine the gold cost.

I already mentioned this to the GM, and if I can determine the gold formula he said he'll let me use other fiends but I've scoured the internet (and my limited mathematical talents) but I can't seem to find the formula. Does anybody know what it is, or did Wizards just pull numbers out of thin air?

If anyone needs them, here are the numbers from the ToM:

Fiend: Binding Cost/Truespeak DC
Babau: 2.7k/27
Succubus: 3.6k/29
Hellcat: 4.9k/29
Vrock: 6.6k/33
Cauchemar Nightmare: 8.8k/37
Retriever demon: 11k/37
Hezrou demon: 15k/37
Barbed devil: 20k/37
Ice devil: 26k/41
Marilith demon: 34k/49