This is actually a prove that the AI more clever than we think!

Okay, now the problem has become rather serious.  I really can't kill Karavox, under any circumstances...

Notice the Kraxis-Icon hovering above my army.  That's my Sov riding the Warg, a Squad of Archer Units, and a Squad of Rushers.

Notice here...  The Ruins of Gandra are now gone, I've explored them, emptied them out, and taken the Mithralar Shard that was inside.  (I still have no clue what those are for.  Shop Fodder I guess?)

I'm still incapable of killing Lord Karavox.  My plans for a Conquest Victory have gone out the window...  Which is a shame, because I have like, 20 levels in Conquest at this point and only like 8 in anything else...  Maybe more like 10 or 12 in Domination, but you get my point.

Still hilarious though...  Karavox is one smart cookie.

Edit:  Hey...  I never noticed all those tiny little people doing stuff in my city before.  Neat.

This game is rapidly reaching a point where it is growing a form of superior intelligence of its own. The AI is probably holding Brad prisoner in his bedroom as we speak while he was trying to change its code!

At times perhaps. But you did ask for a solution. Razing is a valid solution...

Make peace with him. He will be your bitch for ever after unless your military weakens. Or you can make peace, sign a non aggression pact so he can move them when he leavers the city far enough use that curdgens inferno on him. It kills him instantly and no chance of escape. I have used that on factions I am allied with when they started harassing another faction, just cause the volcano to arise under the sov no matter where he is and its all over and no one suspects a thing. Best exploit ever!

Non-Agg pact wouldn't help.  It doesn't let you move through cities.  I found that out in the game before this one.  I was Non-Agg, Trade Treaty, Tech Treaty, and even Alliance Treaty with Tarth.  I was trying to explore the continent because I was basically locked in one little corner, but Irane had placed two cities and grew them to block the passes around the Mountain I needed to get by.  Even with all the pacts and treaties, my units could not move through the city.  Curgen's Inferno could work though.

Edited for Typo

Edit Again:

And granted, razing is a perfectly valid solution...  But even if it wasn't my only size 5 city, I still wouldn't raze it, unless I had a slew of other Size 5 cities, which I clearly don't.  Even then, I'd be loathe to do it, and I'd think most players would be.

It also has a farm, and I'm already at like -23 or something food...  Don't wanna lose that.

I agree with harpo.  besides, isn't it time you 'redecorate that "capitol" you conquered? 

It's Lord Karavox, he's hardly a 'goody-do-all,' as you put it.  Furthermore, why burn it down when I can keep it, my only size 5 city, and just let him rot in there until I'm ready to win the game? 

@ Other Posters:  Why redecorate?  Both Empire's, don't need to change anything he's got in there, just add stuff probably.

Furthermore, this discussion, beyond the actual problem herein, is now moot, as Karavox is dead, the game over and won.

@Polistes:  Curgen's Inferno did the trick.  Thanks!