You squint into the blackness and you see it. You can't control your reaction; the hairs on your neck stand up, and you freeze. What you're looking at isn't the end of the hallway - it's something worse. A monstrous shape is looming in the far shadows of this corridor, the darkness no longer hiding its true nature: a terrifying, 7-foot-tall assemblage of human body parts, whose breadth spans the entire width of the room.
You realize, now, that some of the more unusual sounds coming from the wing are coming from this <span class="mu-i">thing</span>; there, mixed in with the cacophany of disgusting noises coming from the rooms, this indescribable creature, which thankfully appears to be preoccupied with something on the floor, is emitting sounds that sound like a mix between pained human sobbing and the screeching of an animal being devoured by a predator.
There aren't many places to go - this room you're in used to be an office, as evidenced by the remains of a desk and a chair, both of which have been smashed to pieces. The only escape aside from back out the way you came is upstairs, but you see no way to ascend them without alerting the creature to your presence.
Time passes in slow motion while you consider your options. Moments ago, the voice in your mind urging you to continue looking to your sister was loud and clear, but in this instant, very bone in your body is urging you to turn and run.
>Go upstairs. (Alerts the creature)>Summon your courage, draw your longsword, and advance. (Initiative)>Cast a spell or use an item. (list: https://pastebin.com/chuTtwgW) >Use Channel Divinity (1/1) for Destroy Undead, or Radiance of the Dawn. (https://pastebin.com/chuTtwgW)>Test your luck; use your words to try and communicate with the thing.>Turn around and run.>Other (specify) 