Merlin smirked at the fear and shock on Morgana's face. However, his smirk faded as Morgana's eyes rolled back and she collapsed, seemingly unconscious. Merlin quickly opened the cell door and walked over to Morgana, then felt for a pulse. After a few seconds, he figured that the shock must have been to much for her to handle. He placed her on the cot and muttered, "Ic ácwice þé," his eyes flashing gold.
Morgana blinked and opened her eyes. Her expression was confused for a second before she realized what had just happened, at which point it grew angry. Merlin just stood there, watching her.
Morgana noticed the cell door was open, and started to make a dash for it. Merlin's eyes flashed again, and the cell door slammed shut. Morgana grasped onto the bars and shook them, but to no avail. After a few seconds, she sat down on the floor, her back to Merlin.
Merlin quickly muttered "Edniwe min geoguð", and turned back to his normal age. Neither of them spoke for a while, until Merlin said, "Why don't you sit on the cot? The floor can't be comfortable."
"Why would you care about my comfort?" Morgana replied angrily.
"Because I have no interest in seeing you in pain," said Merlin. "Besides, you're already suffering a lot already."
Morgana didn't reply, but did get up and move back to the cot, where she sat facing Merlin. The two of them were silent for a while, before Morgana asked, "Why did you do this?"
"Do what?"
"Bind my magic."
"Because your access to it would place Arthur in danger," said Merlin. "And I won't allow that. Not any more."
"So you think that just because you're using magic to protect Arthur, he won't kill you?" Morgana sneered.
"I do," replied Merlin.
They were silent once more, before Merlin got up from the wall he was leaning against and walked out of the door. He started walking away, before he turned around and said, "If it's any consolation, I'll try to make sure Arthur doesn't execute you." With that, he walked away.
So I'm thinking that in the next chapter or so, Merlin talks to Kilgarrah, who tells him that the Eancanah can get rid of Morgana's magic. How does that outcome sound by you guys?