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Revengeance Indicator.png
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Revengeance Mode-Only Content: This information applies only to Revengeance Mode and Revengeance Mode worlds.
  • Laudanum.png
Stack digit 1.png
TypeAccessoryCrafting material
TooltipConverts certain debuffs into buffs and extends their durations
Debuffs affected: Darkness, Blackout, Confused, Slow, Weak,
Broken Armor, Armor Crunch, Chilled, Ichor, and Obstructed
Revengeance drop
RarityRarity Level: 3
Sell 80 Silver Coin.png
Research1 required
Dropped by
Any Treasure Bag in Revengeance Mode11.67% Revengeance Mode

The Laudanum is a Pre-Hardmode accessory that can be obtained from any Treasure Bag at a 1.67% chance in Revengeance Mode. When equipped, any time the player gets inflicted with the following debuffs, they will receive specific buffs and the duration of the "debuffs" will be doubled.

The following debuffs will be converted to net-positive effects while the player is afflicted by them:

  • Armor Crunch provides 15 defense.
  • Blackout cancels light reduction and gives +30 defense, +25% damage and +10% critical strike chance.
  • Broken Armor cancels defense penalty and gives +25% defense.
  • Chilled cancels movement penalty and provides 1.3x movement speed.
  • Confused cancels reversed controls and gives +30 defense, +25% damage and +10% critical strike chance.
  • Darkness cancels light reduction and gives +15 defense, +10% damage and +5% critical strike chance.
  • Ichor gives +25 net defense.
  • Obstructed cancels vision obstruction and gives +50 defense, +50% damage and +25% critical strike chance.
  • Slow cancels movement penalty and provides 1.5x movement speed.
  • Weak gives +10% net melee damage, +10 net defense, and +20% net movement speed.



Crafting Station
Shimmer TransmutationShimmer Transmutation
Stress PillsStress Pills1

Used in


  • Equipping the Laudanum does not prevent the player from being immune to the converted debuffs. The Ankh Shield and any of its related accessories will still provide immunity to the debuffs converted by Laudanum, meaning the player will not receive the positive effects if they have both equipped.
  • All treasure bags have a 5% chance of containing any of the three universal Revengeance accessories, the other two being Stress Pills and Heart of Darkness, and then a 1/3 roll is cast for which accessory is given. This results in a 1.67% chance to obtain any of the three accessories; however, the player can never receive more than one at a time.


  • This accessory's appearance is based on the Laudanum from Darkest Dungeon.
    • In previous versions of the mod, this accessory made the player immune to the Horror debuff. This was likely also a reference to Darkest Dungeon, in which Laudanum purges the game's Horror effect.
  • Laudanum is an extract of Papaver somniferum latex containing approximately 10% powdered latex by weight. It is useful as an Analgesic and Antidiarrheal.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Can now be swapped with Heart of Darkness and Stress Pills using shimmer.
  • Fixed it still mentioning War Cleave in its tooltip despite its removal.
  • No longer grants positive effects when affected by War Cleave.
  • No longer grants immunity to Armor Crunch or War Cleave, and now causes them to grant net-positive effects.
  • Reworked, now provides net-positive effects while the player is affected with Blackout, Broken Armor, Chilled, Confused, Darkness, Ichor, Obstructed, Slow, and Weak. No longer provides net-positive effects while the player is affected by Horror.
    • No longer grants stat boosts or immunity to Horror.
    • Now causes Horror to last twice as long, but provides the player with several positive buffs instead of harming the player.
  • Fixed it dropping much more often than intended.
    • Nerfed defense boost from 8 to 6.
    • Now drops from Treasure Bags instead of directly from bosses.
  • No longer provides a critical strike chance boost.
  • Now increases the player's damage and critical strike chance by 6% at all times.
  • Now has a "Revengeance drop" tooltip line.