vengeance of the dead, how it works with 1000+ ?

[triqui]

Hi!
I have been the target of the vengeance of the Dead spell this turn. Several times. Each round of the spell, i killed each and every ghost, but the problem is that the next round, each and every ghost killed count as a dead by the SC, so each and every round, the number of ghosts double.

What happens when there are 1000, 2000 or 9999999 ghosts? (assuming i can kill them all). Is the game stalled at round 75? I die? (i guess the ghosts dont run or break morale in round 50, do they?)