The Destroyer King

There has been an invasion, Fae King Vaelion, the King of a powerful Dark Realm has stepped into the human world, driven by his hatred for humans. He hungers to wipe out human kind and rule the human world. The problem is his power is so great that there is no one on this earth whos powers match his to oppose him....except yours. You are human, but mostly something else. Your ancestry traces back to powerful ancient beings of great power. A fact you have tried to keep secret your entire life. But a secret government branch has been watching you. They know what, and who you really are, and they want your help. You, without much choice, agree. Any soldiers fighting against him so far have fallen. No one can face him but you, and as you walk in a battlefield towards him, you sense his dark power, and as he lays eyes on you, you also sense something else.