I'm sure Final Fantasy had them before Diablo. IIRC, they were called materia. Any FF fans like to comment?
Materia had some differences, though the seed of the idea was definitely there. Put
Fire materia into your sword, you'd do fire damage. Put it into your armor, you'd resist fire damage.
Materia also had levels, kind of like this, but it would count for both. Like, if you had a greater
Fire materia, it would do MORE fire damage in a sword, and it might reduce the damage form fire even more, or negate it entirely, or even absorb it as healing.
In that respect, they were a bit more flexible.
And they also taught you magic spells. Imagine if a least truedeath crystal, when it became lesser, also taught you
disrupt undead, kind of.
I'm not sure if this pre-dated Diablo, but the concepts are close cousins.
....Ah, glad to see D&D is 10 years behind the curve.
