Dungeon Defenders

The Lord Award is given for killing 50 monsters within 5 seconds. You don't really need to go after this as it is quite likely you'll unlock it while playing on one of the campaign maps on Insane Difficulty, or whilst going after the Survival mode trophies. Get your Level 70 DPS-Huntress out and spam Piercing Shot and you'll get it easily.

You can see if you have achieved the award at the end of the round by checking the Hero tab at the Crystal and pressing . You can also check it at the Crystal in the Tavern.