No attack will come toward you without being answered in kind.

Encounter   ✦     Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 6[W] + Strength modifier damage. Until the end of your next turn, you can make a melee basic attack as a free action against any enemy adjacent to you that hits or misses you.

  Thaneborn Triumph: Until the end of your next turn, you gain a power bonus to basic attack rolls equal to your Charisma modifier.

Published in Player's Handbook 2, page(s) 60.