Defeat 25 heroes from the end of mayhem missions.

In general, any enemy from the groups Freedom Phalanx, Vindicators, WISDOM, or Paragon Heroes count.

• Does not have to be Signature Heroes, or of Hero rank to count. Any end-mission heroes in mayhem missions count, as well as a number of heroes from other, non-mayhem, missions.
• Demons summoned by the hero Infernal count and Tuatha summoned by the hero Woodsman reportedly count. Other good places to find groups of enemies that count include the Lord Recluse Strike Force, signature heroes in Recluse's Victory, and the Take out the Vindicators mission from Abyss.
• Heroes can earn this as heroes by defeating 25 Malaise Nightmares during Who Will Die episode 4. It is uncertain if this is a bug or not.
• During the Spring Event, this badge can be obtained relatively quickly from Kadabra Kill's wedding mission.

This badge displays different names, depending on a character's current alignment.

• Bloody Hands on heroes and vigilantes
• Hero Slayer on villains and rogues