Frost Barrier

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Frost Barrier
  • Frost Barrier.png
Stack digit 1.png
TooltipYou will freeze nearby enemies when you are struck
Grants immunity to Chilled and Frostburn
Inflicts DebuffGlacial StateGlacial State
100% chance

Debuff duration0.17-2 seconds
Debuff tooltipCannot move
Grants immunity toChilledFrostburn
RarityRarity Level: 4
Sell 2 Gold Coin.png 40 Silver Coin.png
Research1 required
Dropped by
Ice Clasper120%

The Frost Barrier is a Hardmode accessory that is dropped by Ice Claspers. When equipped, it provides 10 defense. Getting hit by attacks inflicts nearby enemies with the Glacial State debuff. Both the range and duration of the Glacial State debuff are based on the damage the player took. It also grants immunity to the Chilled and Frostburn debuffs.


  • 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.


  • If used with knockback immunity, it can potentially trap enemies in the player, killing them very quickly.



These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Buffed defense boost from 4 to 10. It now grants immunity to Frostburn.
    • 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.
  • No longer inflicts Glacial State on hit while a boss is alive.
  • Now has a tooltip stating it provides heat and cold immunity in Death Mode.