Silencing Your Spies When They Get Caught

[Vinom]

I'd have the say the simplest method is to replace one of their teeth with a bead of force, or similar item... they bite down, taking out a few people and destroying their head in the process.

[McPoyo]

I'd have the say the simplest method is to replace one of their teeth with a bead of force, or similar item... they bite down, taking out a few people and destroying their head in the process.

More expensive, but more effective, than my method. Quite a bit more effective, actually.

[veekie]

It'd bar them from approaching the corpse as well, good time for the retrieval spells to go off and teleport the corpse back. Once hes dead, it's an object.

I mean, would you want to chance them raising a sentient undead out of the corpse and commanding it?

EDIT: Wait, what if you use disguised undead spies?

[McPoyo]

It'd bar them from approaching the corpse as well, good time for the retrieval spells to go off and teleport the corpse back. Once hes dead, it's an object.

I mean, would you want to chance them raising a sentient undead out of the corpse and commanding it?

EDIT: Wait, what if you use disguised undead spies?

What if they anticipated this type trap, and put up an AMF around him though. If they trapped him there, the magical precautions would cease working. Need a non-magical backup.

[veekie]

Fast acting Int poison coupled to a slower Con poison, in large dosage. If they raise the AMF, theres no chance of them stopping the poison from dissolving your brain and then your organs. If they don't you go boom and get retrieved.

[Vinom]

Line the skull with thermite (or DnD alchemic equivelent) and it set off when the bead of force in cracked... not as effective for others, but still renders the spy a corpse and the corpse unable to speak...

[Havok4]

Another option to use if the enemies manage to disable your spy's suicide method is to love your spies and then cast love's pain repeatedly on yourself.

[Vinom]

The spy who loved me?

[wotmaniac]

Something that I'm doing in my current campaign (which was inspired by one of the PCs in my last one):
Make prolific use of the Mother Cyst spells (LM).

Necrotic Cyst is at the heart of it (of course). 
Necrotic Tumor, with carefully worded instruction to not violate OPSEC is very useful for not being caught to begin with.  It also prevents someone from extracting information from your operatives.

Craft Contingency is also pretty awesome.  (because of time and costs constraints) Use "craft contingency" to hit-up your key operatives with a Necrotic Eruption or Necrotic Termination, in the event that OPSEC get's potentially compromised.

This has become a major focal point for my current campaign -- while the PCs are becoming frustrated (and have definitely compromised their morals and ethics when dealing with it), the players just love the insidiousness of it.

[McPoyo]

That made me a little jealous I hadn't already thought of it. Very nice.