Splitting special quality

[s-dub]

Does anyone know if a "splitting" bow is published in any of WoTC's books?

I was thinking that multishot, improved multishot, and a splitting bow would make for some ridiculous sneak attack damage when paired with deadeye shot.

 

[Runestar]

There is a splitting weapon property in champions of ruin, which splits each arrow you fire into 2 (so you deal twice the damage). Vastly undercosted at +3.