As a feat, you may pick up one class feature of a class you do not posess any levels in. This replaces Durable, Weapon Mastery, and Mage Initiate.
-If you choose spellcasting, you gain two cantrips, one first level spell, and one ADDITIONAL first level spell slot.
-If you take this a more than once, you may select a new class or a class feature one level higher than the previous take in the same class. If you can take an ability for a level which would allow the class to gain an archetype ability you may gain an archetype feature. You may also take any ability for a level you have previously taken. This may be used to dip into a second archetype of your class, and in this case the next archetype feature for your second archetype is treated as one level above the previous.
--If you take the Mage Initiate option in the same class more than once, just increment any mention of spell level