You can craft magic rings of epic power.
Prerequisites: Forge Ring, Knowledge (arcana) 35 ranks, Spellcraft 35 ranks.
Benefit: The character can forge magic rings that exceed the normal limits for such items. For instance, you could craft a ring of protection that granted a deflection bonus of greater than +5 or an item that required prerequisite spells of higher than 9th level. See Creating Epic Rings for details.
Source: Standard Reference Document under Open Game License v1.0a, which updated this feat originally published in the Epic Level Handbook, page 56.