FAQ: Q. What, exactly, does this mean?
A. When the card is played and a d6 is rolled, if the result is 1, 2, or 3 the slaying attempt fails, the monster is dealt 1 damage, and the d6 is rolled again. On another result of 1, 2, or 3, the slaying attempt fails, the monster is dealt 1 damage and the d6 is rolled again. If the result is 4, 5, or 6, the victim is slain.
Essentially, the victim WILL be slain eventually, but the question is how painful will the victim make it for the monster?
Q. Is the damage applied all at once or is it applied one at a time? I ask in the case of monsters with damage reduction powers.
A. One at a time. Roll, deal damage, roll again, deal damage . . .
Source:
Miss Information @ WK Forums
here