Starblade Flurry

Paragon Tier
Prerequisite: 11th level, monk, Flurry of Blows class feature
Benefit: When you use your Flurry of Blows power, you can add a single target within 5 squares of you by throwing a dagger or a shuriken that you have in hand. Doing so doesn't provoke opportunity attacks.

Published in Player's Handbook 3, page(s) 189.