Ranger - "Higher Vampire" [5th Campaign, 5th Mission]

if you defeat all the dragons, there's a cutscene where the twilight fades over Irolan, and it's illuminated by sunlight. Two dragon nests are located in the dungeon, one next to the first Necropolis castle, and another three on that part of the continent where the other castles are located. What does "moves" mean? Do you kill it, and then it reappears near one of the Necropolis castles?