Tiaral

They couldn't be hypnotized.

Natural immunities? (Okay. That's a shame.
Well, in any case, between two deaths, it would be worth choosing a more noble one, in an attempt to overcome insurmountable circumstances and show all sorts of unpleasant people that you don't negotiate with terrorists. At best, if you know in advance that you will die in both places, you could do something nasty: take the crafted bombs, try to find all the exits from the stronghold and collapse them, burying those scoundrels there.