In a game I am in, the DM wants to encourage the fighter, who is a very reluctant defender to more actively defend. The fighter is built on the "gentleman adventurer" lines, and the DM has expressed interest in providing an item which allows the fighter to parry strikes meant for other players as an interrupt.
The fundamental desire is to entice the fighter closer to the center of the action and to have exciting immediate interrupt powers such that he wants to pay attention to the game outside of his own turn (which is a horrible failing in a fighter, but generalized fixes are outside the scope of this question).
A parry, functionally, is an immediate interrupt that, on hit, does a bit of damage and reduces the to-hit rolls of the opponents on the primary target or redirects the attack to the fighter.
Are there any items, powers, or class features that provide for the visual aspect of rushing around the battlefield, parrying strikes meant for other people?