Draedon's Heart

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Draedon's Heart
  • Draedon's Heart.gif
Stack digit 1.png
Tooltip15% reduced contact damage from enemies
Replaces Adrenaline with the Nanomachines meter
Unlike Adrenaline, you lose no Nanomachines when you take damage, but they stop accumulating for 1 second
With full Nanomachines, press Adrenaline Mode to heal 360 health over 2 seconds
While healing you take 50% less damage
'Nanomachines, son.'
RarityRarity Level: 15
Sell 48 Gold Coin.png
Research1 required
Nanomachines Meter.gif
Nanomachines Meter
Dropped by
Exo Mechs
XB-∞ Hekate

Draedon's Heart is a post-Moon Lord accessory that is dropped by the Exo Mechs. When equipped, it grants 48 defense, reduces incoming contact damage by 15%, and adds a Nanomachines meter, replacing the Adrenaline Meter in Revengeance Mode or higher. The Nanomachines meter will gradually charge over time during boss encounters, taking 30 seconds to fill up. When the meter is full, it can be activated, which will cause the player to heal for 360 HP over two seconds and gain a massive boost to their damage reduction. Getting hit while the meter is charging will not deplete the meter but will cause it to stop charging for 1 second.


  • Equipping Draedon's Heart will activate the player's Adrenaline Meter even if Revengeance Mode is not active.


  • This accessory, and its numerous survivability benefits, are a reference to an ability possessed by the character Senator Armstrong from the game Metal Gear Rising: Revengeance. In the game, Armstrong utilizes nanomachines in his body to harden himself and become near impervious to damage.
    • Its flavor text is a direct quote from Armstrong.
    • The source of Armstrong's ability was his cybernetic heart, hence the item's name.
  • Before the update, the accessory was a combination of three Revengeance Mode-exclusive accessories: the Heart of Darkness, Laudanum, and Stress Pills.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • No longer reduces defense damage by 50%.
    • Shield effects now cause the Nanomachines Meter to stop charging for 0.5 seconds if the shield fully absorbs a hit.
    • Increased sell price from 30 Gold Coin to 48 Gold Coin.
  • Now reduces the defense damage percentage to 16.67%.
  • Now has a custom Nanomachines Meter texture.
    • Reworked:
      • No longer increases the player's life regeneration and damage reduction while standing still, and instead adds the Nanomachines meter.
      • The Nanomachines meter will gradually charge over time during boss encounters.
      • When the meter is full, it can be activated, which will cause the player to heal for 360 health over two seconds while hindering the player's movement.
      • Activating the Nanomachines meter will also cause the player to dismount if they are using one.
      • Getting hit while the meter is charging will cause the meter to stop charging for 1 second.
      • If the player is on Revengeance Mode or higher, while equipped this accessory will replace the Adrenaline Meter with the Nanomachines meter.
      • Additionally, it now grants the player 48 defense.
  • Fixed a bug that prevented it from halving projectile damage when idle.
    • Now reduces defense damage by 50%, and causes standing still to boost life regeneration and increase defense by 75%, but reduces damage by 50%.
    • No longer inherits the effects of Laudanum, Stress Pills, or Heart of Darkness.
    • No longer crafted, and now drops from the Exo Mechs in Expert Mode.
    • Readded its flavor tooltip.
    • Now uses 1 Ascendant Spirit Essence in its recipe instead of 5 Phantoplasm.
    • Now requires a Draedon's Forge to craft instead of an Ancient Manipulator.
    • Nerfed passive damage boost from 10% to 5%.
    • Now inherits the reworked effects of Laudanum and Stress Pills.
  • Now uses 250 Nanites in its recipe.
  • Changed tooltip to reflect the name change for Absolute Rage.
    • Now increases the player's chance of being inflicted with Heart Attack.
    • Now causes Rage Meter to deal more damage.
    • Nerfed defense boost while standing still from 50 to 25.
    • Now boosts speed by 5%.
    • Life regeneration boost now works while a boss is alive.
    • Increased the amount of Rage it causes the player to gain.
    • Now uses 5 Cosmilite Bars and 5 Phantoplasm in its recipe instead of 30 Luminite Bars.
    • Removed flavor tooltip.
  • Nerfed life regeneration boost when standing still from 8 to 4.
  • Nerfed defense boost when standing still from 100 to 50.
  • No longer makes the player emit light based on Rage level.
  • No longer grants any benefits relating to Stress, and now lets the player generate Rage over time instead of Stress.
    • Now grants immunity to Horror.
    • Fixed a bug where it would not grant its defense boost when standing still with Demonshade armor.
  • Now uses 30 Luminite Bars in its recipe.