Aquatic Heart

From Calamity Mod Wiki
Jump to navigation Jump to search
Aquatic Heart
  • Aquatic Heart.png
  • Aquatic Heart equipped Ice Shield
Stack digit 1.png
TooltipTransforms the holder into a light-emitting water elemental
The following effects are only active after Skeletron is defeated:
Wow, you can swim now!
Going underwater gives Ocean's Blessing, which increases max speed and acceleration by 15%
Greatly reduces breath loss and provides a small amount of light in the abyss
Enemies are inflicted with Glacial State when they touch you
You have a layer of ice around you that absorbs 20% damage but breaks after one hit
After 30 seconds the ice shield will regenerate
Grants BuffWater Elemental (buff)Water Elemental
Buff tooltipYou are a water elemental now
Grants BuffOcean's BlessingOcean's Blessing
Buff durationInfinite (in water)
6 seconds (out of water)
Buff tooltip15% increased max speed and acceleration
Grants BuffIce Shield (buff)Ice Shield
Buff durationInfinite (when not broken)
Buff tooltipAbsorbs 20% damage from the next hit you take, then shatters
Inflicts DebuffGlacial StateGlacial State
100% chance

Debuff duration0.17-2 seconds
Debuff tooltipCannot move
RarityRarity Level: 4
Sell 2 Gold Coin.png 40 Silver Coin.png
Research1 required
Cooldown used
Ice Shield Cooldown
Ice Shield Cooldown
30 seconds (On hit)
Dropped by

The Aquatic Heart is a Pre-Hardmode accessory dropped by ???. Equipping it transforms the user into a water elemental and causes them to emit light. After Skeletron is defeated, they gain a wide variety of bonuses including:

  • Improved underwater breathing ability
  • The ability to move through water unhindered, and the Ocean's Blessing buff while submerged which boosts underwater movement speed even further.
  • Nearby enemies are inflicted with the Glacial State debuff when the player is hurt; the duration and range of enemies that are inflicted scales with damage taken.
  • An Ice Shield which absorbs 20% of damage from hits (with a cooldown of 30 seconds).


  • It can be considered an upgraded version of Neptune's Shell.
  • Changing the accessory to "Hidden" will make the player look normal; however, the Ice Shield will still be visible.
  • A male character will always appear and sound like a female character while this accessory is visible. Despite this, NPC messages and death messages are not affected.
  • The accessory's freezing function does not work while a boss is alive.
  • The freeze distance (in pixels) is calculated by taking a random number between 200 + (damage taken / 2) and 300 + (damage taken * 2). This distance gets softcapped over 500 to be only 75% as effective, over 700 to be only 50% as effective, and over 900 to be only 25% as effective.
  • The duration that Glacial State is inflicted for (in frames) is calculated by taking a random number between 10 + (damage taken / 4) and 20 + (damage taken / 3). This duration is capped at 120 frames, or 2 seconds.
  • The character emits pale blue light while the Ice Shield is active, and orange light when it is recharging.
  • The damage reduction provided by the Ice Shield is calculated separately from typical damage reduction. As a result, it is not affected by the Calamity Mod's DR soft cap.


  • Talking to the Drunk Princess with the Aquatic Heart equipped will display a unique quote.
  • This was formerly two items known as Siren's Hearts, which could be either blue or green.
    • Only the green heart was considered to be gamagamer's Developer item, as they insisted on adding the green variants for this item as well as the Siren itself.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Glacial State infliction range is no longer random, and is now always what was the maximum range.
    • Infliction range is now softcapped over 31.25 tiles to be 50% as effective instead of 75%, but it no longer has additional softcaps at ranges of 43.75 or 56.25.
    • Increased the range of its Glacial State duration, and Glacial State infliction now works while a boss is alive.
  • Removed Ice Shield Cooldown debuff; it now appears on the cooldown rack.
  • Fixed Ice Shield buff displaying incorrect percentages.
    • Renamed from "Siren's Heart" to "Aquatic Heart".
    • Renamed "Siren (Blue)" to "Water Elemental" and "Siren Speed" to "Ocean's Blessing".
    • No longer grants defense, life regeneration, or creature detection, and no longer provides Town NPC shop discounts.
    • Resprited it, its Water Elemental, Ocean's Blessing, and Ice Shield buffs, and its Ice Shield Cooldown debuff.
    • Removed the green variant.
  • Now increases Abyss light level by 1.
  • Fixed Ice Shield buff's description saying the buff absorbs 20% damage instead of 15%.
  • Nerfed Ice Shield's damage reduction boost from 20% to 15%.
    • Nerfed defense boost in Hardmode from 10 to 5, and defense boost post-Moon Lord from 15 to 5.
    • Resprited buff icons.
    • The Siren buff no longer gains extra life regeneration in Hardmode.
    • Fixed Ice Shield (buff)'s description still saying that the buff reduces damage by 50% instead of 20%.
    • Both variants' Ice Shields now increase damage reduction by 20% instead of 25%.
    • Both variants now emit an orange light instead of a green one.
  • Added the line "Greatly reduces breath loss in the abyss" to the tooltips of both variants.
  • Resprited the Blue Siren and Green Siren buffs, and both equipped sprites.
    • Now only provides an NPC shop discount in Hardmode instead of after defeating Skeletron.
    • Nerfed defense boost in Hardmode from 15 to 10, and defense boost after defeating Moon Lord from 20 to 15.
    • Ice shield now regenerates after 30 seconds instead of 1 minute.
    • Nerfed Siren Speed movement speed boost from 25% to 15%.
    • Several effects have been locked behind Skeletron:
      • The player now only gains 1 defense and no life regeneration before defeating Skeletron, but will gain 5 defense and 1 life regeneration after defeating Skeletron.
      • Discount Card effect, Siren Speed, Gills effect, and Flipper effect are now locked behind Skeletron.
    • Ice Shield Cooldown now lasts 60 seconds instead of 30.
    • Now has a "Revengeance drop" tooltip line.
  • Now grants extra life regeneration and defense in Hardmode and after defeating Moon Lord.