Bleeding Backstab

Paragon Tier
Prerequisite: 11th level, rogue, Sneak Attack class feature
Benefit: Whenever you deal Sneak Attack damage to a target with a rogue daily attack power, the target takes ongoing 5 damage (save ends). If the power already deals ongoing damage that has no damage type, instead increase that ongoing damage by 5.

Published in Martial Power, page(s) 140.