Colonel, I have a question for you regarding the effects of
possession in 1e AD&D, viz., I haven't been able to find anything in the core books specifying exactly what happens when someone is possessed and who or what can do the possessing.
I didn't see any mention of the ability in the MM entry for "Devil" or for "Demon." In the Greyhawk Glossography, however, the adventure outline "The Copper Raider" mentions that Clonoc the copper dragon is possessed by a demon, but doesn't specify what kind. (Heh, I hope to spring this adventure, or at least a variation of it, on my players in the future, btw

)
The DMG says that a "Protection from Possession" scroll works against spells such as "magic jar", mental/psychic draining attacks or "demon, devil, night hag, or similar creature possession (obsession). I assume this refers to the Night Hag ability to "ride" a person mentioned in the MM and that this means
both devils and demons can possess someone.
So, my questions are these:
1) What
happens when someone is possessed? Should I just treat the effect as a "Magic Jar" spell?
2) Can
all demons and devil possess someone or only certain types (presumably the more powerful ones)?
3) Do you envision Daemons and Demodands having this ability, or is it limited to the creatures already mentioned?
4) The DMG mentions that a "Protection from Possession" scroll works even for dead bodies. I'm assuming that a possessed dead body would be animated and function under the influence of said possessing creature (and be able to be turned by a Cleric as a "special" on the turning table).
5) Just out of curiosity, would you think it owuld be possible to possess an intelligent sword since it has its own poersonality?
Sheesh, that's a much longer question than I originally thought! Hope you don't mind and thanks in advance for the help!
Gray Mouser