When can the opponent alter the three dice rolled for Vampire Lord's Rend effect?

Question

Accepted Answer

Only before targeting begins. Rend's three effect dice are rolled in step 4 of the Offensive Roll Phase, after the five-dice roll is accepted. They lock once targeting starts, and an accepted roll cannot be reopened, so only dice rolled in the Defensive Roll Phase can be changed afterward.

Dice Throne: Season Two – Battle Chest

When can the opponent alter the three dice rolled for Vampire Lord's Rend effect?