Hardened Shell

Hardened Shell

Buff
This creature cannot lose more than 20 HP each turn.

Skulking Colony, the Underdocks elite, carries 20 stacks (times the player count in multiplayer). The power tracks unblocked damage received during the current side turn and cuts any HP loss down to whatever is left of that 20. The icon shows the remaining allowance. Once you have dealt 20 in a turn its HP bar turns purple and further hits do nothing until a new turn starts.

Kind
Hardened ShellBuff
Stacks
Yes
Applied by
1 enemy

Where it comes from

Enemies that apply Hardened Shell

Notes

The counter resets at the start of every side turn, yours and the enemy's, so poison or thorns-style damage during its turn gets its own 20. That purple no-damage state is exactly what Hellraiser checks to cap its auto-plays. With 75 HP (80 on Ascension 8+) it takes at least 4 turns to kill; spend leftover Energy on Block rather than wasted damage.

Rules and timing

In co-op an enemy receives more of it: the amount rises with the number of players.

Changes by version

  1. 18 Jun 2026Changev0.107.1
    Hardened Shell increased from 15 to 20
  2. 21 May 2026ChangeBeta branch
    Hardened Shell power increased from 15 to 20
  3. 29 Jan 2026ChangeInternal playtest
    Hardened Shell power max HP loss per turn decreased from 25 to 20
All 8 patch notes5 older
  1. 5 Jun 2025TextInternal playtest
    Reworded Hardened Shell power hovertip to read as "cannot lose more than X HP each turn"
  2. 22 May 2025Bug fixInternal playtest
    Mad Crab's Hardened Shell power now properly counts damage from Starter Flare relic
  3. 1 May 2025TextInternal playtest
    Mad Crab's Hardened Shell power worded such that it cannot lose more than X amount of HP each turn
    Bug fixInternal playtest
    Mad Crab's Hardened Shell power now scales up in multiplayer
  4. 25 Apr 2025Bug fixPoisonInternal playtest
    Poison damage no longer skips Hardened Shell power's damage threshold
  5. 17 Apr 2025InterfaceInternal playtest
    Hardened Shell power now counts down to show how much damage is left to be dealt
    Bug fixInternal playtest
    Fixed typo in Hardened Shell power description

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

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