This is the goal of a character of mine, playing in a pathfinder game that will be using the 3.5 epic rules (although the GM redid epic spellcasting). It's also the kind of item I expect will cause my character to retire, assuming it actually gets made, so it's a campaign-long quest for him...
I'm just wondering, bookwise, what the cost would be? Does the 50 diamonds of 25k or more trigger the "> 200k = epic and thus is 10x as expensive" from 3.5?Does that mean that each individual dimanod needs to be worth 250k?
Not if you want to be able to get a +5 inherent bonus to all your stats over the course of a week.
If that's the aim, would five separate 1/day items work out cheaper?
The now classic use is to couple it with an Arcane Sorcerer bloodline.
"Arcane Apotheosis (Ex): At 20th level, your body surges with arcane power. You can add any metamagic feats that you know to your spells without increasing their casting time, although you must still expend higher-level spell slots. Whenever you use magic items that require charges, you can instead expend spell slots to power the item. For every three levels of spell slots that you expend, you consume one less charge when using a magic item that expends charges."
At 20th level all you need is one charge of wish in a magic item and you can do all your stats in one day without having to buy any tomes.
Pathfinder doesn't seem to have char op builds with catchy names like existed on the old WOTC forums.
But there is a build floating around out there somewhere with an Arcane Bloodline Sorcerer who uses a staff with wish in it.
Hmmmm I wonder if you could use Use Magic Device to emulate that class feature for the Arcane Bloodline?
a) what GM would ever let you make/use such an item?
b) what GM would ever give such an item to his players?
The OP said it was a long term campaign goal, and once achieved he would retire the character. As such I would allow it to get made, although I really wouldn't worry about the cost - that would all be taken care of in the questing to find someone who could help you make it or the materials needed. Yes, I would rule its an artifact (and as such ignore the basic item creation rules), and once you made it some god of magic or artifice would 'promote' you to subordinate demi-god status and take you off the mortal plane.