You enhance your bonded focus, allowing it to grow in magical power.
Prerequisites
Arcane Bond, Arcane Lore 5 ranks, arcane caster level 5th.
Benefit
Your Bonded Focus gains an additional Bonded Focus Ability appropriate to its type.
Special
You can gain this feat a maximum number of times equal to your key ability ability modifier (not counting any bonuses from items or magic). Its benefits stack.