"Maximizing Your Gameplay in Final Fantasy XVI: Tips and Tricks"
To master abilities in Final Fantasy XVI, keep upgrading the ability with Ability Points until the prompt changes from "Upgrade" to "Master." This unlocks the ability's final form and new build options for Clive. Mastering equipable Eikon abilities allows them to be slotted into any Eikon skill slot. Final Fantasy XVI lets you respec at any point for free, so feel free to experiment with your playstyle.