User blog comment:Morganaforever/Morgana's torturer in 5x08/@comment-5674726-20121117214304/@comment-5674726-20121117225717

Wouldn't it be impossible for someone to restrain Morgana and Aithusa without the use of magic?

That's something I'd really like to see clarified.

Short of it taking two years for Morgana's magic to return after Merlin's spell, I doubt that a conventional prison would hold her. Aithusa wouldn't be able to use fire with Morgana in close quarters but she has magic of her own, which she could have used to give Morgana a power boost if one was needed, unless that can only be done for a Dragonlord.

Unless it was some kind of purpose-built magic proof prison, or the chains were enchanted to block magic, Morgana should have been able to escape if she had the use of her powers. Even if she couldn't blast her way out, she's used teleportation in the past.