We give them a taste of their own medicine. Trick them into thinking our prisoner is somewhere he isn't, and lure them into a trap. If they survive it, they'll think twice about attacking again... Given the terrain and what they're up against, it would turn into a battle of attrition, and they'd be the ones at a disadvantage this time.

[Raiding Achamoth to snag some prisoners on public display was dangerous, but at least the entry and exit points were obvious, as were the targets. A huge forest that blocks scrying filled with mist and dangerous creatures, not so much.]

They might even be forced to come to the negotiation table when they realise what they're up against. Which means...

[Well, he's sure Dextera can fill in the blanks. That part was his idea, after all.]