kreynolds said:Since each head of the weapon is enhanced separately, i.e. it's treated as two separate weapons, then I think each head has it's own +10 limit, just like two different weapons. Otherwise, double-weapons would make the crappiest magic weapons out there.
here's a "me too."
even from the point of view of a DM, i'd still allow double weapons to have up to +10 per end.
and allowing them to have different enhancements is just too cool! i had an idea for a villain in my last campaign who had a magic double sword named "Fire and Ice" -- one end had flaming and the other frost.
re: the sword you describe, i'd say only one end needs throwing and returning. the other half just gets carried along for the ride.
of course, if i built it this way, i'd only allow *one* end (the throwing end) to attack people at range. the only way that both ends could be used at range is if they both had throwing. only one end needs returning, though.
at least, that's how i'd build it.