"Give me a moment, please. Zoe, can you come with me?"
Inside the catacombs, he bends down in the dirt and dust, drawing the seal of Focalor.
"It has become apparent to me that your skills in the field of Necromancy are lacking. This is nothing to be ashamed of. There are other ways to power than through magic. I was made famous for my necromancy, but that is only half of what made me powerful. The other half came from beings outside of our multiverse, called Vestiges. They are a diverse bunch, exiled from the multiverse for many reasons. I am preparing to summon Focalor, the Prince of Tears. You will not speak while the Vestige is present. Hold your questions for later. After we leave the catacombs, I will answer your questions. Now, watch closely. Focalor, the Prince of Tears, I call you this mortal coil!"
After the binding takes place, Bill returns to the surface, Zoe in town. He speaks to the team assembled.
"Yesterday, I was able to scout out the catacombs, down the final level. Level one through three are empty, except for one skeleton. It will allow us past, for some reason. Bare it no mind. Level four is full of zombies. On level five, ghouls have setup an ambush. Level six is empty, but some ghouls may have wandered down from level five. Level seven contains some Wights and Ghasts. On Level Eight, two skeletons are guarding a door. I have not passed through it, so anything might be behind it. I suspect that the source of the undead is behind the door.
"I want to make this perfectly clear: we will not be attempting to clear out the catacombs today. This is a surgical strike. We get in, we take out the source of the undead, and we get out. We will deal with the rest of the infestation later. Here's the plan: I will cast Hide from Undead on all of us, which will last for 50 minutes. We will have to refresh it periodically. You WILL NOT touch, attack or cast a spell at any of the undead, or that will leave us all visible to the hordes. Now, I may not be able to see or hear you, so do not touch me, talk to me or interact with me unless I say otherwise. Stay close and don't get separated. When we get to the end of each level, throw a rock against the wall if everyone made it through. I expect you all to follow my instructions to the letter until we get to door.
"Any questions?"