Plagued Fuel Pack

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Plagued Fuel Pack
  • Plagued Fuel Pack.png
Stack digit 1.png
TypeAccessoryCrafting material
Tooltip8% increased rogue damage and 15% increased rogue projectile velocity
Stealth generates 10% faster
Press Booster Dash to consume 25% of your maximum stealth to perform a swift upwards/diagonal dash which leaves a trail of plagued clouds
This effect has a 1 second cooldown before it can be used again
Inflicts DebuffPlaguePlague
100% chance

Debuff duration4 seconds (Cloud)
Debuff tooltipRotting from the inside
RarityRarity Level: 8
Sell 12 Gold Coin.png
Research1 required
Projectile created
Plague Cloud
Plague Cloud
Cooldown used
Rogue Booster Cooldown
Rogue Booster Cooldown
1 second (After usage)
Dropped by

The Plagued Fuel Pack is a Hardmode accessory that is dropped by Plaguebringers. While equipped, rogue damage and projectile velocity are passively increased by 8% and 15% respectively. The player's stealth also generates 10% faster.

Pressing the Booster Dash key causes the player to dash diagonally upwards in the player's direction at the cost of 25% of the player's stealth, leaving a trail of damaging clouds that inflict the Plague debuff. The dash has a 1 second cooldown before being usable again.


Used in


  • The Plagued Fuel Pack cannot be equipped if the player is wearing the Blunder Booster accessory, and vice versa.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Now spawns 8-9 clouds when dashing instead of 2-9.
    • Clouds now last 2 seconds instead of 1.67, have an innate 5 armor penetration, and are exempt from the pierce resist system.
    • Buffed rogue damage boost from 5% to 8%.
    • Plagued clouds now grant 6 local immunity frames instead of -1.
  • Cloud now inflicts Plague for 4 seconds instead of 5.
    • Decreased internal cooldown from 1.5 seconds to 1.
    • Now increases stealth generation by 10%.
    • Fixed it having an outdated tooltip.
    • Nerfed rogue damage boost from 8% to 5%.
    • Tooltip now dynamically updates based on the player's chosen key for it.
    • Now obtainable.
    • Cloud now functions in PvP.