Spell Mastery Feat 20
Source Pathfinder Player Core
You have mastered a handful of spells to such a degree that you can cast them even if you haven't prepared them in advance. Select any four spells of 9th rank or lower that are in your spellbook; each spell you select must be of a different rank. These spells are automatically prepared when you make your daily preparations, and you gain an extra spell slot for each spell. You can select a different combination of spells by spending 1 week of downtime studying your spellbook and retraining your mastered spells.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
WizardThis indicates abilities from the wizard class.