- Not to be confused with Dark Hearts, an enemy summoned by the Hive Mind.
The Heart of Darkness is a Revengeance Mode-exclusive Pre-Hardmode accessory that fills up the Rage Meter by 30 per second and boosts the damage Rage Mode deals by 15% (30% in Death Mode) when activated. It also makes the player five times as likely to be inflicted with the Heart Attack debuff, and it increases the player's damage by 10% while afflicted with it.
Any Boss in Revengeance Mode has a 5% chance to drop this accessory, Stress Pills, or Laudanum.
- This accessory is very useful for players whose play-style revolves around frequent use of the Rage Meter, as it reduces the amount of damage they need to take in order to enact their strategies.