Rending Tempest
Epic Tier
Prerequisite: 21st level, Dex 17, fighter or ranger
Benefit: During your turn, when you hit a target with a melee attack using a power that requires the use of two weapons, the target takes 1[W] extra damage (off-hand weapon) when you hit it with any other melee attacks until the end of that turn.
Update (6/14/2010)
Replace the feat's Benefit entry with the following text: “During your turn, when you hit a target with a melee attack using a power that requires the use of two weapons, the target takes 1[W] extra damage (off-hand weapon) when you hit it with any other melee attacks until the end of that turn.”
Published in Martial Power, page(s) 148.