A long time ago, in a forum right above this one on the list, Kirbwarrior posted this in a suggestions thread...
Game over warp:
If you die in a room with this, you warp like other warps.
Ex: No weapons, and a huge army of Death Knights just appeared. When you die, you find yourself in a prison....
This is now (crudely) possible. Make a DMap for that room, set the continue point to the relative coordinates for the "prison". Ensure that "continue here" is enabled. Then sidewarp yourself into and out of the death DMap. Thus, when you die and continue, you'll end up in the "prison".