Swamped

You're just behind him, so you can soon see for yourself. The passage ahead is sloping downward heading deeper underground. But it's filled with water.

"I'm guessing this wasn't here when you carried the coffin," you tell him.

"It was not. I am concerned - even if this has nothing to do with my disappearing colleagues, it may have caused damage to the crypt itself."

"I'll take a look," Marian says. "Let me squeeze past."

She slips past the rest of you one at a time, then dives into the water. Huh, you wouldn't have taken her for a swimmer. Especially not the sort to hop in fully dressed.

It's a few minutes before she comes back up.

"There's a stone door at the bottom," she says. "Is that part of the crypt?"

"I do not remember," Drip says. "It may have been open when I was here before."

"It's probably keeping the water out," Arlene says. "So maybe there's someone at the bottom using the water to stop people like us from following them in."

You glance at Marian.

"You're a wizard. Any chance you can do something about this?"

"Several ideas come to mind, but most of them would risk damaging the crypt. The rest would take hours," she sighs. She comes out of the water fully, raises a hand, and suddenly dries herself. "I did find something while I was down there, though, and it might be of interest to the crew of the Golem."

She holds something up. It takes you a moment to get a good look at it, since Drip is in the way.