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Caustic cloud

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Caustic cloud

Caustic clouds are a detrimental ground effect that deals chaos damage over time. The amount of damage per second inflicted by caustic clouds depends on its source.


  • Caustic ArrowCaustic ArrowAttack, AoE, Duration, Chaos, Bow
    Radius: 20
    Mana Cost: (8-16)
    Cast Time: 1.00 sec
    Projectile Speed: 3260
    Requires Level 4Fires an arrow which deals additional chaos damage to enemies it hits, and creates a caustic cloud. Enemies in the cloud take chaos damage over time.Per 1% Quality:
    0.5% increased Area of Effect
    Base duration is (2.8-4.8) seconds
    Deals (5.3-765) Base Chaos Damage per second
    Gain (30-49)% of your Physical Damage as Extra Chaos Damage
    Modifiers to Projectile Damage apply to this Skill's Damage Over Time effect
    +(0-4) to radius
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Caustic Arrow skill icon.png
  • Necromancer's ascendancy passive Beacon of Corruption
  • Strongboxes with the 'Contaminated' prefix
  • The caustic bomb thrown by Undying Alchemists
  • Certain zombies, which release caustic clouds when destroyed

Version history

Version Changes
  • We've made performance improvements to ground effects. They now use considerably less bandwidth and server resources. Disconnections or lockstep stuttering near ground effects should occur far less often.
  • Poison Arrow and Ground Fire should now cause fewer graphical performance issues.