With pleading words and gestures, you discourage your enemies from striking down the wounded.

Encounter
Minor Action      Close burst 5

Target: You or one ally in the burst; the target must be bloodied

Effect: Until the end of your next turn or until the target is no longer bloodied, the target's movement does not provoke opportunity attacks, and the target gains a +4 power bonus to all defenses.

Published in Player's Handbook 3, page(s) 167.