Type: Epic
Source: Player's Guide to Faerûn
You can inscribe runes of epic power.
Prerequisite: Int 19, Craft (any appropriate for runecasting) 24 ranks, Inscribe Rune.
Benefit: You can inscribe runes that exceed the normal limits (see Runcaster prestige class). For instance, you could inscribe a rune with a spell greater than 9th level, or a rune with a caster level greater than 20th.
Even this feat does not allow you to inscribe a rune with an epic spell (see Chapter 2: Epic Spells in the Epic Level Handbook). Such magic defies the power of the written word and thus cannot be scribed into runic form.