Greater Eldritch Lore Feat
You have learned a broad range of additional potent magic.
Key ability score 21, Eldritch Lore, Lesser Eldritch Lore, Minor Eldritch Lore, caster level 13th, 13 levels in a class with a class spell list
You gain one additional 3rd-level spell known from your class spell list.
For every 3 levels by which your caster level exceeds 13th, you can take this feat an additional time. You cannot take this feat more times than you have taken Eldritch Lore. Each time you select this feat, you gain a different 3rd-level spell known from your class spell list.