Much of the time I think of items as addons to a build, and focus on the race, class, and feat progression when planning. However, in both Westmarches and many standard canpaigns, it is not unreasonable to be able to buy, craft, or at least request some specific items, at least going up to Rare rarity. That got me thinking about trying to optimize a build around the item, rather than the other way around.
Out of the Abyss provides a unique and interesting Rare item, the Stonespeaker Crystal. It has 10 charges, regains ~7 per day, allows spending some charges to cast the three Speak With spells, and, most importantly, allows expending a number of charges equal to a divination spell's level to replace one consumed spell component. The following divination spells have consumed spell compoments:
- Divination (4) 25gp¹
- Fortune's Favor (2) 100gp
- Legend Lore (5) 250gp
- True Seeing (6) 25gp
¹uses two components with combined cost of 25gp, so the crystal can only replace one of them.
If you play with EGtW, the obvious use case for this is the Graviturgy or Chronurgy Wizard, getting Fortune's Favor (upcastable for more targets, letting you safely cover a party at least once per day with a 1-hour long Lucky d20 each). You also get Legend Lore (cast for free once per day to keep improving your results about the same thing) as well as True Seeing as a Wizard, and since TCoE expanded Wizard spells to include Divination, you don't even need Ritual Caster Cleric to get the full set. It's nice to have the crystal on a Wizard who normally doesn't get Speak with Animals or Speak with Plants too.
The most broken use of this item that I can think of is, conveniently, with Chronurgy's Arcane Abeyance on Fortune's Favor. Cast Fortune's Favor at 5th level on four members of the party, and then also save a bead with a 4th level casting to re-up three party members' Lucky dice mid-combat, increasing the likelihood they actually use them. Between that, Chronal Shift, Silvery Barbs, and Convergent Future, you might as well be the DM now.
Even without EGtW, a Divination Wizard can benefit greatly from the Stonespeaker Crystal thanks to Expert Divination, effectively reducing the total burned cost of Legend Lore to one fifth of a spell slot. Again, after enough castings, you at least know as much as the DM does, and with Portent and Silvery Barbs can control the outcome somewhat.
Did I miss any synergies worth exploring?
Preface: I have a lot of AI skepticism.
My company is using Cursor and Windsurf, focusing on agent mode (and whatever Windsurf's equivalent is). It hallucinates real hard with any open ended task, but when you have ALL of:
Then you can tell the agent to write test cases before writing code, and run all relevant tests when making any code changes. What it produces is often fine, but rarely great. If you get clever with setting up rules (that tell it to do all of the above), you can sometimes just drop in a product requirement and have it implement, making only minor recommendations. It's as if you are pair programming with an idiot savant, emphasis on idiot.
But whose app is well covered with tests? (Admittedly, AI can help speed up the boilerplating necessary to backfill test cases, so long as someone knows how the app is supposed to work). Whose app is well-modularized such that it's easy to select only downstream affected tests for any given code change? (If you know what the modules should be, AI can help... But it's pretty bad at figuring that out itself). And who writes well thought out product use cases nowadays?
If we were still in the olde waterfall era, with requirements written by business analysts, then maybe this could unlock the fabled 100x gains per developer. Or 10x gains. Or 1.1x gains, most likely.
But nowadays it's more common for AI to write the use cases, hallucinate edge cases that aren't real, and when coupled with the above, patchwork together an app that no one fully understands, and that only sometimes works.
Edit: if all of that sounds like TDD, which on its own gives devs a speed boost when they actually use it consistently, and you wonder if CEOs will claim that the boosts are attributable to AI when their devs finally start to TDD like they have been told to for decades now, well, I wonder the same thing.