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.




  • 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".