Shapeshifters omega

Five years ago Tiona was captured by a witch named Duncan. Tortured, experimented on and changed both mentally and physically. After loosing her mind and her light she now holds her captors essence inside her soul. After killing him and escaping all she craves is more power but in her quest for power she is now being hunted.Filled with the desire to stay free, Her only hope of returning to the person she once was and ridding herself of the darkness that now shrouds her is a lone wolf. An omega named Slo who in his search for his lost love has given himself fully to the wolf inside him. She sees him as a tool to get the power she wants. Now bound to her he has no choice but to do her bidding. little does he know that this dark beauty is the girl he's been looking for all these years. Will he be able to unlock her heart before she does the unthinkable? Note: cover art is not my own: