A/N: New story! Yay! I actually have tons to update, but I don't really care. I don't own Merlin.

Morgana waited patiently for her sister to get to the point. She had gone off on a rant, but she was nearing the meaning.

"Sister, I've found a way."Morgause said.

"To infiltrate Camelot?" Morgana asked.

"Did you not hear a word I just said? Of course! Do I ever have other ideas?"

Morgana thought about that "…No. What's the idea?"

"Possession. You could learn everything!"

"Not in the body of a man, I hope." Morgana said haughtily.

"Well, it depends… You might have to… But I've found the spell, here!" Morgause said, shoving a book at Morgana.

"'Side effects may involve: Nausea, vomiting, fainting, violent shaking, etc.'" Morgana read, "What's the etc. supposed to mean? And besides, I'm sure no one would notice any of that."

"Exactly!" Morgause said excitedly.

"Must I put a sarcasm sign over my head every time I speak, Morgause?"

Morgause looked crestfallen. "Well, are you going to or not?" she asked.

"Yes, whatever. It won't work, I want you to know that."

Merlin was first suspicious when Gwen looked like she had been struck by lightning. Again when she began studying her arms.

Then when she muttered 'shoddy workmanship' under her breath.

"Gwen, you okay?" Merlin asked.

"Yes." she snapped, then said, "Sorry, I don't know what's gotten into me."

Merlin nodded slightly, and made a mental note to keep an eye on her.

Arthur was suspicious of Merlin keeping such a close eye on Gwen. Oh, well, it wasn't like the knights didn't already do that, what harm could Merlin be?

But then he realized why he was watching her. Later, when he passed her in the hall, she curtsied and said 'Sire'.

"Alright," Arthur said, smiling, "Why are you doing that?"

This seemed to strike her dumb.

"Well, you're the prince…"

"Not even Merlin calls me Sire, it's not like you have to."

Gwen closed her eyes, and passed out. Arthur barely caught her. He could faintly hear a 'stupid Morgause' as he carried her to Gaius.

"Undivided attention." he said to Merlin, who had just come in, "Got it? Watch her at all times possible."

Merlin started to say he was already doing that, but decided it to be worthless.

Then Gwen sneezed, and wondered how she had got there.

Morgana, however, was panicking.

How would you feel if you were suddenly your worst enemy?

A/N: Please review!