the card description states that the heros must carry villagers out the dungeon, and the heros get 1 conquest for each villager saved. the OL get 2 for every one they leave behind. Is anything to stop the OL killing the villagers, and if so is that classed as them being left behind?

Dungeon 37 Web of Lives

The card clearly states that monsters can NOT kill the villagers. The OL only gets XP if he can force the heroes to leave without one or more villagers. I just played this one this weekend.

Yeah never read the card right to early in the morning here.