Okay so here's the story: in an upcoming campaign, I will be sharing DMS duties with a player who's shown interest.
Now, we are planning on playing the same person, but the PC has mutiple personalities. So when I'm DMing, he plays one personality, and when he DMs I play the other. That way we won't have to explain two PCs jumping in and out of the party, plus it'd be fun to role play.
Thing is, if someone other than the two of us wanted to DM, even for one session, well... you can see how that'd be a problem.
QUESTION: Is there a spell that would split the character in two, if only (and preferably) for a small period of time? Maybe even an illusion or something.
We are playing in the Forgotten Realms, 4th edition.