[aldiss2]

After reading the earlier question I felt like seeing how the costs were done.

Test Item was a
Robe of Invulnerability - base 80 earth gems


cyclops (0% Bonus) 80
cyclops w/ Dwarven Hammer (25% Bonus) 60
cyclops w/ Hammer of the Forge Lord (50% Bonus) 40

black priest (25% Bonus) 60
black priest w/ Dwarven Hammer (50% Bonus) 40
black priest w/ Hammer of the Forge Lord (75% Bonus) 20


Now we move them over to "The Steel Ovens" (20% Construction Bonus)
The "Ancient Forge" and the "Banefire Forge" each have a 20% bonus as well

cyclops (0% Bonus) 64
cyclops w/ Dwarven Hammer (25% Bonus) 44
cyclops w/ Hammer of the Forge Lord (50% Bonus) 24

black priest (25% Bonus) 44
black priest w/ Dwarven Hammer (50% Bonus) 24
black priest w/ Hammer of the Forge Lord (75% Bonus) 16

The formula seems to be
Cost = [Base Cost]
- Caster Bonus (Intrinsic Bonus + Item Bonus) * Base Cost
- Site Bonus * Base Cost


We now cast Forge of Ancients

cyclops (0% Bonus) 40
cyclops w/ Dwarven Hammer (25% Bonus) 30
cyclops w/ Hammer of the Forge Lord (50% Bonus) 20

black priest (25% Bonus) 30
black priest w/ Dwarven Hammer (50% Bonus) 20
black priest w/ Hammer of the Forge Lord (75% Bonus) 10


Now we move them over to "The Steel Ovens" (20% Construction Bonus)
The "Ancient Forge" and the "Banefire Forge" each have a 20% bonus as well

cyclops (0% Bonus) 32
cyclops w/ Dwarven Hammer (25% Bonus) 22
cyclops w/ Hammer of the Forge Lord (50% Bonus) 12

black priest (25% Bonus) 22
black priest w/ Dwarven Hammer (50% Bonus) 12
black priest w/ Hammer of the Forge Lord (75% Bonus) 8


The formula is now:
1) If FoA is Active, BaseCost=BaseCost/2
2) Cost = [Base Cost]
- Caster Bonus (Intrinsic Bonus + Item Bonus) * Base Cost
- Site Bonus * Base Cost


But then the weird stuff, it seems there are minimums (Notice that Last result)

All the following made using
black priest w/ Hammer of the Forge Lord
on "The Steel Ovens" while FoA is active
I'm just listing the earth gem costs

Item/Base/Cost
The Summit/40/4
Dwarven Hammer/20/2
Sword of Many Colors/40/4
Stinger/5/_0_
Smasher/10/1

So it seems the minimum cost is 10% of the initial base, but they round down so you get 5 gem items for free.

aldiss