Aerenal Arcanist

(Player's Guide to Eberron, page 20, DnD 3.5)

[General]

Your family has studied wizardry for thousands of years. You spent your childhood in arcane libraries, and this early education gives you a great breadth of knowledge.

Prerequisite

Elf, region of origin Aerenal

Benefit

You get a +2 bonus on Knowledge (arcana) checks. Every time you gain a wizard level after taking this feat (including 1st level), you can add one additional spell to your spellbook.