Hero’s Challenge (3.5e Maneuver)

As a foe prepares to deal a devastating blow to one of your allies, you break its focus with a shout or a taunt, drawing its attention to you.

Whenever an enemy that threatens you makes a melee attack against one of your allies, you may initiate this maneuver. If you do, make an Intimidate check, opposed by that opponent’s attack roll. If you succeed, then the target of their attack changes from that ally to you. You may initiate this maneuver after you see the result of that enemy’s attack roll.