Just as Andrew had guessed, Marie and the other members of the black night agreed to join the Heavenly Palace after Oliver spent a lot of time convincing them. Technically two hours wasn't really a long amount of time, but Oliver had been having conversations with this group for a month, in the last two hours he just took the final step, so it was really a long time of conversation.
Andrew doesn't really know what Oliver said to convince them, but he didn't bother to ask, because they had accepted and that was all he need to know. Quickly Andrew asked Oliver to explain the plan he had in mind.
When Andrew started this conversation, Oliver had said that he had a plan, but the Heavenly Palace was understaffed, however, adding the members of the black night that problem was solved.
