Calamity Mod Wiki
Acidic Rain Barrel
  • Acidic Rain Barrel.png
Stack digit 1.png
Damage43 Rogue
Knockback8 (Very Strong)
Critical chance4%
Use time21 Fast
TooltipThrows a rolling barrel that explodes on wall collision
Stealth strikes make it rain on collision
Inflicts DebuffIrradiatedIrradiated
100% chance

Debuff duration3 seconds (Shrapnel)
3-5 seconds (Droplet)
Debuff tooltipYour skin is burning off
Inflicts DebuffPoisonedPoisoned
50% chance

Debuff duration1-3 seconds (Droplet)
Debuff tooltipSlowly losing life
Inflicts DebuffSulphuric PoisoningSulphuric Poisoning
12.5% chance

Debuff duration1-2 seconds (Droplet)
Debuff tooltipThe acidic water burns away your flesh
RarityRarity Level: 5
Sell 7 Gold Coin.png 20 Silver Coin.png
Projectile created
Acid Droplet
Acid Droplet
Barrel Shrapnel
Barrel Shrapnels

The Acidic Rain Barrel is a craftable Hardmode bomb that is an upgrade to the Blast Barrel. It throws a barrel that rolls across the ground that pierces through all enemies it comes into contact with until it either despawns or hits a wall. Hitting a wall causes the barrel to erupt into shrapnel and acidic raindrops.

Performing a stealth strike with the Acidic Rain Barrel causes the resulting barrel to be able to bounce off walls up to a total of three times, and also causes more shrapnels and raindrops to erupt.

Its best modifier is Flawless.



Crafting Station
Iron AnvilIron Anvil
Lead AnvilLead Anvil
Blast BarrelBlast Barrel1
Contaminated BileContaminated Bile1
Corroded FossilCorroded Fossil15
Acidic Rain BarrelAcidic Rain Barrel1


  • Much like the Blast Barrel, this weapon is a reference to the Donkey Kong game series, which frequently features explosive barrels.
    • The barrel projectile is referred to as "GreenDonkeyKongReference".