The Monster Within Him

After years of being stepped on, being abused, and being hated, Elijah decides to retaliate. He creates another being of himself, deep within his mind. It's job was to protect him, and to give him uttermost strength in times of fighting and pain. But it's turned on him ever since he met Elizabeth and fell madly in love with her. Eli wants Liz to kill the monster inside of him with her love, the only way he ever created for it to be destroyed. Now it's turned on him, and wants to kill Eli, and the only way to do that is to drive away Liz. Eli has made it so it can never hurt her, but will this thing break free and fight to its max to ensure Elijah's destruction?