Would that be the "prior to 3e" editions that had things like the sage & well...Up through 3e, forks were attuned by being made of a specific metal with a very specific shape that keyed it to a plane and if the plane had layers, a specific layer of that plane. So the fork for the 312th layer of the Abyss might be made out of nickel, have a shaft that is 8 and 9/16 of an inch long, and 1/32 of an inch in diameter, shaped like a triangle, the first tine of the fork might be hexagonal, 1 inch at the base and tapering off at a very specific rate to 1/4 of an inch at the top, and 12 inches long, with the second tine being round and 1/10 of an inch in diameter for the entire 3 and 3/4 inch length. If any of those things is even a little off, it fails to be attuned to that layer.
It is not easy to find out exactly what you need and then build it to exacting detail.
I don't know how 4e did it, but 5e just left it at, "attuned to the plane," which leaves it to the DM to figure out what is meant by that.
Oh look, there's that sage again. Since it's mentioned there though, spell research was covered on DMG 64-65 & on PHB page 113 along with several other points in the phb saying the DM has rules for spell research & magic item creation.
Also this is weirdly specific, where on earth are you getting it from?
Since That's a page from ad&d2e which is very much "prior to 3e" & I can't recall ever seeing this level of specificity outside of a novel perhaps.Up through 3e, forks were attuned by being made of a specific metal with a very specific shape that keyed it to a plane and if the plane had layers, a specific layer of that plane. So the fork for the 312th layer of the Abyss might be made out of nickel, have a shaft that is 8 and 9/16 of an inch long, and 1/32 of an inch in diameter, shaped like a triangle, the first tine of the fork might be hexagonal, 1 inch at the base and tapering off at a very specific rate to 1/4 of an inch at the top, and 12 inches long, with the second tine being round and 1/10 of an inch in diameter for the entire 3 and 3/4 inch length. If any of those things is even a little off, it fails to be attuned to that layer.
It is not easy to find out exactly what you need and then build it to exacting detail.
I don't know how 4e did it, but 5e just left it at, "attuned to the plane," which leaves it to the DM to figure out what is meant by that.






