Maddening Blow (3.5e Maneuver)

Go back to playing with your Tinkertoys, wiz-kid!

You can initiate this maneuver whenever you would make an attack against a spellcaster in the process of casting a spell, as long as that attack is not part of another maneuver or a full attack. You can initiate this maneuver as part of an attack of opportunity or as a standard action. Make a single melee attack. If it connects, the attack does 8d6 extra damage, and is considered to have dealt five times as much damage as it actually did for the purpose of determining the Concentration DC to avoid losing a spell, power, or other such ability.