Trollsmyth over on taichara's blog had the word "wayedge" as his word verification for a comment. It sounded like a cool name, so they decided to individually make a magic item with the name Wayedge. The name caught my imagination too, so here is my take on Wayedge.
Jie Chue, master forger of the ancient empire, long ago crafted a small blade for a patron who's name has passed into the sands of history. Tales of the blade, however, have turned up from time to time. An elven assassin once used Wayedge to slay a noble baron, which spurred the baron's daughter to take up his sword while his son took up the crown. It is also told that Wayedge brought low the Goblin King of Thunder Rift in the hands of a courageous halfling.
It is not known where Wayedge currently rests, but it never stays out of bardic tales for long.
Wayedge is a single edged shortsword with a gently curved blade. It's hilt is a flowing brass knot-work design that begins at the cross-guard and finished at the pommel. It is preternaturally sharp and polished without ever needing to be tended. Wayedge is enchanted as a +2 shortsword with two unusual enchantments. The first allows it to be thrown as a dagger. The second manifests itself rarely, only when it has been thrown as a dagger and the player rolls a natural 20 on their attack. When this happens the character who threw Wayedge will be instantly teleported next to the target and able to make a second attack without penalty.
In 4th edition terms as an at-will interrupt ability on a critical hit when thrown, Wayedge allows the owner to teleport adjacent to the target and make a second basic attack after the teleport.
Trollsmyth: Magic Item: Wayedge
A Hamsterish Hoard of Dungeons and Dragons: Magic Item: Wayedge
**Edited to add**