>>9866370
If the non-Astral Intruders attempt to leave Room A or Room B before rescuing their fellows from the Astral Plane, the Astral Intruders appear at the points in the following diagram, half on one point, half on the other (round up):
o= point Astral Intruder Appear
A= Room A
B= Room B
- = Doorway
o-B-A-o
They are accompanied with lifeless simulacra, enchanted to appear with their features. Both the intruders and the simulacra appear, for the first few minutes, to be dead. If there is only one Astral intruder, his corresponding simulacrum is at the opposite point on the diagram. Once the first few minutes are up, the intruders are all free to move freely. The simulacra all mimic, as best as possible, the actions of their corresponding intruders.
From there on, you can take it. Throw in an illusion to switch around the facial features of the intruders, make the simulacra actually dopplegangers, make the eviscera a small flesh golem or a bomb, or throw in some ghosts or strange astral creatures. Go to town. My parties always have fun with this trick.