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This page describes old mod content that was removed or replaced. The information here does not apply to the current version of the Calamity Mod.
Iron Heart
  • Iron Heart
Stack digit 1
Statistics
TypeTool
Use time45 Very Slow
TooltipHealing with potions and all positive life regen is disabled.
Enemy damage scales with your max health.
Can be toggled on and off.
RarityRarity Level: rainbow
SellNo value
IronHeartsAppearance
Hearts after using the Iron Heart

The Iron Heart was an item placed in a newly spawned player's inventory. Upon being used in Expert Mode, it enabled or disabled several effects on every character in the current world:

  • Natural Health regeneration couldn't increase beyond 0, preventing the player from naturally healing over time.
    • If the player was under effects that decreased life regeneration (such as Alcohol, Mana Polarizer, or Ethereal Extorter), life regeneration bonuses were able to offset them up to the point where they dealt no damage. Damaging debuffs, however, were unaffected by this, and would deal full damage regardless of the player's hidden life regeneration.
  • Recovery Potions couldn't be used.
  • Direct damage taken by the player dealt a minimum amount of damage, dependent on the player's max HP. The damage floor was calculated as 40 + 10% of the player's max HP. Hits that would deal more damage than this minimum would deal their normal damage.
    • Damage Reduction was applied before Iron Heart's damage floor; it could only reduce the base damage of the attack taken down to that floor. Defense, however, was applied after Iron Heart, and could reduce the amount of damage taken in one hit to below the damage floor.
  • The player's life hearts would become light gray in appearance, with black 'eyes' on either side of each, matching the appearance of being heart-shaped skulls. They remained with this appearance even after using Life Fruits or other permanent power-ups.
  • The player would have custom hit and death sounds.
    • A softer version of the hit sound played if the taken damage was below (and therefore increased to) the damage floor, and a louder version played if the damage taken was above the damage floor.

Notes[]

  • The Iron Heart's effects were tied to the world it was used in, rather than the player that used it. This means that all players that join a world in which the Iron Heart had been used would have the Iron Heart's effects, even if they didn't use the item.
  • Hearts, the Nurse, and Lifesteal effects would still heal the player even while Iron Heart was active.
  • The damage multiplier applied to the player by the Blood Pact's critical hits and the Dimensional Soul Artifact were applied after Iron Heart's damage floor.
  • Permafrost's Concoction, the Nebulous Core, and the Draconic Elixir's revive effects could still restore the player to their set health amounts while Iron Heart was active.
  • Fall damage, thorny bushes, and (wooden) spikes were unaffected by Iron Heart's damage floor, but Traps were affected.
  • The Bloodflare Core could heal the player while Iron Heart was active, as it healed the player directly instead of increasing life regeneration.

Tips[]

  • Due to disabled life regeneration, Iron Heart would be used to trigger certain effects that only happened when below certain amount of health such as Necklace of Vexation, or Sulfuric Scale.
    • The player could manually lower their health to trigger these effects by using items such as the Thorn Blossom.

Trivia[]

  • The appearance of the life hearts after using the Iron Heart was a reference to the game Hollow Knight, in which the player's mask-based life meter bears a striking resemblance.
    • This item's name is a reference to Hollow Knight's perma-death mode, known as "Steel Soul".
  • The life hearts' appearance also referenced the life hearts in Minecraft's perma-death mode known as "Hardcore", as the mode causes the player's hearts to develop eye-like streaks.
  • In previous versions of the mod, this item made dying while a boss was alive permanently kill the player in a similar manner to Hardcore.
    • Additionally in previous versions of the mod, this item became unusable after a minute of runtime in the world.
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