Cantrip Expansion Feat 2BardClericOracleSorcererWitchWizardSource Advanced Player's Guide pg. 101,
Core Rulebook pg. 100 2.0
A greater understanding of your magic broadens your range of simple spells.
Prepared Caster (Cleric, Wizard, etc.): You can prepare two additional cantrips each day.
Spontaneous Caster (Bard, Sorcerer, etc.): Add two additional cantrips from your spell list to your repertoire.