"There will be two assault waves," Potter explains. He is standing in front of the wall with the blueprints, his arms crossed tightly. "The first wave will set off an hour earlier. Their task will be to disarm the wards in two different spots so that the second wave can then storm the grounds in two groups. There will also be scouts who will be on the lookout for anything unusual. Under no circumstances must we be discovered before we are in the house. That would jeopardize the whole operation and we can't risk that. We won't get another chance like this anytime soon." 