The Paths of Power — Patti Larsen

When the broken and insane Guardian Keymaster creates him a new Portal Key, Aiden Trent is able to finally continue his quest--to rescue his Keeper friend, Ashala, from the clutches of his enemy, Tremaine, while hunting for his lost parents. But, Ash's acquisition of Fire Paths complicate matters and have them scrambling to finish what Tremaine forced her to start before her evolution can destroy everything...