Using Excalibur to Demoralize Rabble

Fighting types of the Hero level can draw their weapon in an impressive and awe inspiring manner.  This will force 2d6 creatures to make an immediate morale check.  On their own, this may only affect creatures lower than 1 HD.

With a properly powerful weapon, however, the HD cap becomes equal to the plus of the weapon.  The plus can also be a penalty to the forced morale check if the creatures have HD lower than the cap.  If the PC has a weapon that is suitably impressive but doesn't have a magic plus, just give it a rough HD cap and roll with it. 

At Champion level, add an extra 1d6 to the number affected.  Optionally, if you really want it to be overkill on peasant mobs, add 1d6 per creature HD below the cap (so a +3 sword drawn by a Champion against 1/2 HD peasants would force 6d6 to make a morale check!).

Whether or not this could force an additional morale check for any remaining creatures present is up to the DM.