Search the wagon and the mage

It was Ariane who made the suggestion. "We should search him, and the wagon. Something tells me we might find a few things of interest. She headed right for the mage and knelt beside him, groping and searching his dead body for anything of value. What she found was a crystal necklace of a very odd design. She took it from around his neck, and held it up. She could feel the power surging from the crystal as the light hit it. Her fingers started to tingle, and the tingling began to spread up her arm, and all over her body. It caused every hair on her head to stand up on end as she suddenly felt an orgasmic burst of power flowing through her, right down to her very soul. She sat there. motionless, as her hands fixed the crystal necklace around her own neck.

Then a voice spoke inside of Ariane's head. "I own you now, little Elf mage" said the strange voice. "We have become one, and a very beautiful one have we become. You have nothing to fear from me as long as you do what I say. If you disobey me, you will be punished."

"Who are you?" Ariane asked out loud. The other two women had busied themselves with searching the wagon.

"It is not so much as who am I, but what am I?" the voice inside her head said. "So I will answer your question. I am the essence of a great mage who refused to die. His spirit lives on inside the crystal you found. I will tell you honestly my essence can be of great benefit to you, but be wise and use caution, young Elf mage. Let no one else know that I exist. Keep the necklace on at all times. Remove it for nothing. And do not speak aloud to me, unless you want other to think you're crazy. Simply think your thoughts, and I will hear them, just as you hear me."

There were so many questions Ariane wanted to ask the entity in her head. "Where did you come from?" she thought as her first question.

"As I have told you, my dear sweet Elf mage, I am the left over essence of a once great and powerful mage. That power is now yours to wield, but it comes with a price."

Ariane became pensive. "What do you mean? What price?"

"Nothing major, my dear. Just let me out once in a while to experience freedom and the ability to live again. I also want your eternal soul. Give me these things, and you shall have immeasurable powers untold. Will you give them to me? A simple yes will seal the deal."

"Wait a minute!" Ariane screamed in her head. "How do I know you're not some evil essence, trying to take over my body? And what things will you have me do that I must obey?"

The essence laughed. "You are no foolish child, are you my sweet little Elf mage. But now it's too late for you. I have the power to dominate you, and send you into the crystal in my place!" The voice laughed wickedly, and Ariane felt herself being dragged into another world.