Spell Mastery
Special feat
Spell Mastery is a D&D 3.5 feat (Special) from WoW, p. 158. You don't need a spellbook anymore to prepare certain spells.
Prerequisite
Arcanist level 1st.
Benefit
Each time you take this feat, choose a number of spells equal to your Intellect modifier that you already know. From that point on, you can prepare these spells without referring to a spellbook.
Normal
Without this feat, you must use a spellbook to prepare all your spells, except read magic.
Description
You don't need a spellbook anymore to prepare certain spells.