"From what I have been able of gathering, only a few people stand on a pedestal of strength, having now gotten a good idea of a gravelord's prowess, I can suppose that only them can truly give you any sort of a challenge" Loimos and Nosferatu were standing in the middle of one of those immense hallways, the skeleton having agreed to assist in feeding the vampires, they were all dry of blood at the moment and only by consuming any amount of blood could Nosferatu manipulate their blood and get it to multiply on its own.
It was all a lengthy process for every single vampire, thankfully, the gravelord had brought with him not only vampires, lest they would have been here for even longer, though, that did not mean it would be quick, however, the monument had sank deeper into the water, now fully submerged.
So it was not like there were any risks of new invaders, the vampire hunters had all dispersed nearly immediately as well, their plans unknown.