Divinity: Original Sin Maradino's Ghost Bug
A friend and I found a bug in Maradino's Lair.
Found the key to the study on the plant in the back or the cave, killed the sleeping enemies in the study itself before opening the secret door and pilfered it. On our way out, Maradino's ghost spawned, got his buddies up, and keps getting them up. Since we're only lvl 13, after some issues we dragged him out and got him separate from the others, where the video happened.