Another specific question to prevent a Wizard from teleporting but examine him

[Chorus]

Hello there, we play for a long while now the classic Dragonlance campaign and now the following has happend.

Our Raistlin has tried to give a bad injured, fleeing dragon the rest and teleported right behind him, casted a lightning bolt and failed the spell resistance. The dragon turned around, grabed him in flight and prevented any further casting.
Now what to do? The action could have gone well, but was nethertheless a suicide operation.
I don't want to kill the character because it is Raistlin but just want to get him for a longer time out of the game. So he will be bound, gaged, and blinded with a black sack in an unknown place to him.
Would you say it is still possible to examine him?
I have diskussed this with another experienced DM, but we haven't found a conclusion.
I say it is possible to gag someone in a way that he couldn't speak clear enough for casting a spell like teleport (that he still has prepared and the dragon knows this because Raistlin used it to get behind him), but clear enough to understand roughly the answered questions.

What do you think?

[AkaKageWarrior]

telepathy? anti-magic shell?

[uriel222]

Dimensional Anchor?

[Movin]

Constant guard and prepared watchers are an easy answer for most mage tricks. Gagging the PC and giving him a chalkboard then making him write the answers the dragon wants would be a simple method that removes his means to speak but keep his ability to communicate. (this combined with Detect or Seek thoughts on the dragons part would keep the PC from outright lies.)

Teleport is an old trick and methods are available if you want to show off the dragons preparedness at your PC's eventual escape from constant guard with a clever trick.

Teleport Trap is designed to specifically thwart it.
Were I building a lair it is something I would include with money being no object. also a single area just barely large enough for yourself that is not affected by it with a scroll of teleport in order to affect a speedy escape if needed. (and supply your Raistlin an escape route if he is clever enough to find it by listening to guards and the dragons comments.)

[Noir le Lotus]

Give him a poison or a drug (or use some intelligence-drainning creature) to get his intelligence down under 15, so he won't be able to cast 5th level spells.

If casters are available, Feeblemind is the easiest solution !!

[Remco Sommeling]

Simply gag and bind him thoroughly, when the dragon wants to speak with Raistlin have a minion stand by his side removing the Rag and another readied to strike him down if he starts casting a spell.

Preferably a rogue with a weapon capable of dealing subdual damage in combination with sneak attack, which will be automatic on a helpless target, a 7th level rogue would deal 2d4+4+4d6 damage which would make it nearly impossible for him to cast spells.

I'd also drug him making his speech slurred (20% spell failure)and giving him a -2 penalty on all checks (notably initiative, concentration checks, attack rolls and ability checks), possibly combined with fatigue, for some hours.

[Stasiscell]

why would the dragon care for examining him? it sounds like you just dont want to kill the character because of player stupidity (whats he doing tossing non metamagic lightning bolts arround with a sense of bluster anyways?).

why not make it so the dragon slammed raistlin into the ground and instead of outright killing him he went into coma land for a bit.
That seems more thematically appropriate and badass in my opinion as a gm you dont have to explain why he isnt dead just that the fall was enough to kill him but didnt (lucky falling position etc).

[Stasiscell]

besides that will give the other players a chance to make fun of the player who bit off a little bit more than he could chew ( i mean chances are the dragon wouldent have died from the bolt and did the same thing anyways) as they cart his bony butt around until his ass wakes up.

[Chorus]

Thanks for the many answers till now.
To your occurred questions why the dragon wouldn't kill Raistlin: the dragon is no normal dragon. It is Seether, a black dragon assassin with special orders. So the examination wouldn't be done only by her.
And because they captured now such a powerfull mage like Raist who is responsible for so much trouble in the meantime, the dragonarmy of Thakisis will try to receive as much information about the plans of the players as possible. I try to use not only scripted events in such a big campaign. If the players do something that isn't planned, I try to let the other side react in a decent way.
I just want to give the player of Raist the chance to play the beginning of the examination by himself to see what he tells by his own and how he trades for his life. It is not planned till now that he will become free during the next time and it is still an option that the bad guys kill him direct after the interrogation instead of imprisoning him.

Maybe I really use a telephatic link for his answers.

I by myself have tried to speak with a packet of paper tissues in my mouth and thought that it is possible to understand roughly what is said. But it shouldn't be possible to speak clear enough the exact magic formula for casting a spell like it is stated in the rules. How do you see that or how would you define the chance for a spell failure with that?