You cant unlock all descendants without paying for extra roster slots

Level 2 3 Level 1 Spell Level 1 Spell Slots Unlocked: 3: You gain an additional Level 1 Spell Slot Spells Learned: 8: Learn 2 additional 1st Level

With Final Fantasy XIV Patch and the introduction of the Dawntrail expansion comes a new slot in the Character menu: Facewear

unlock 3rd insured slot dmz unlock more skills , find more items , and learn more about the realm of Slot 1 Slot 2 Slot 3 Slot 4 Bag 1 Bag 2 Bag 3 Bag 4 all Bags Out 14 2 @ 3

unlock second insured slot dmz You start with one Talisman slot, but you can unlock three more for a total of four Talisman slots by defeating the following bosses along the critical story