Expanded Spellbook

Heroic Tier
Prerequisite: Wis 13, wizard
Benefit: Choose one daily wizard attack spell of every level you know. Add this spell to your spellbook.
Each time you gain a new level of daily wizard attack spells, you learn one extra spell of that level (in other words, add three spells to your spellbook instead of only two).
This feat doesn’t change the number of daily attack spells you can prepare each day.

Published in Player's Handbook, page(s) 195.