Twilight Fulfilled. Wings In the Night, #15

The vampire Armageddon begins Utana, the common ancestor of all vampires, has been imprisoned in a living death for centuries, driven to near madness. But now he is free and determined to destroy the race he created. With a single white-hot glance, he incinerates his descendants. Brigit Poe is beautiful and deadly. Her gift of destruction has caused her trouble her entire life. She's been scolded for using it, warned to contain it, condemned for possessing it.
And yet now her gift is the only thing that can save her people. She must destroy the first and most powerful of all immortals. Locked in a battle neither can win, the two discover a passion so shocking it threatens everything either of them has ever believed. Their desire might end them both, and with them, an entire species. Never have the stakes been higher. Bonus: Includes a brand new story of Young Rhiannon in the Temple of Isis.