Calamity Mod Wiki
True Biome Blade
  • True Biome Blade.png
Stack digit 1.png
TypeWeaponCrafting material
Damage160 Melee
Knockback7.50 (Very Strong)
Critical chance4%
Use time20 Very Fast
TooltipFires different projectiles based on what biome you're in
RarityRarity Level: 8
Sell 16 Gold Coin.png
Projectile created
Biome Blade (projectile)
True Biome Blade

The True Biome Blade is a craftable Hardmode broadsword that auto-swings and is an upgraded version of the Biome Blade. When swung, it fires a Biome Blade projectile which cannot pierce through tiles nor targets. The color and the debuff inflicted by the projectile on hit varies based on the biome that the player is in. All debuffs inflicted last 6 seconds.

Its best modifier is Legendary.


Only one biome color and debuff can be applied at a time. The following is a list of biome effects from highest to lowest priority.

Biome / Event Color Enemy Debuff
Astral InfectionAstral Infection #FF7F50 ● Astral Infection (debuff)Astral Infection
JungleJungle #80FF80 ● PlaguePlague
Snow biomeSnow / Ice #80FFFF ● Glacial StateGlacial State
Sulphurous SeaSulphurous Sea
#000080 ● Crush DepthCrush Depth
The CorruptionThe Corruption #8040FF ● n/a
The CrimsonThe Crimson #800000 ● n/a
DungeonDungeon #400080 ● FrostburnFrostburn
DesertDesert #FFFF80 ● Holy FlamesHoly Flames
Glowing Mushroom biomeGlowing Mushroom #00FFFF ● Temporal SadnessTemporal Sadness
The UnderworldThe Underworld #FF8000 ● Brimstone FlamesBrimstone Flames
SpaceSpace #FFFFFF ● n/a
The HallowThe Hallow #FFFF00 ● Holy FlamesHoly Flames
None of the above #008000 ● Armor CrunchArmor Crunch



Crafting Station
Mythril AnvilMythril Anvil
Orichalcum AnvilOrichalcum Anvil
Biome BladeBiome Blade1
Living ShardLiving Shard5
Depth CellsDepth Cells10
True Biome BladeTrue Biome Blade1

Used in[]


  • If the player travels into a different biome after a projectile is fired, the projectile will change into that biome's variant.
  • The Ocean, Space, and Underworld biomes are determined by the player's position and depth.
    • Biomes such as the Abyss or the Brimstone Crag will not count as the Ocean or Underworld respectively if they do not meet the position requirements.
      • As most of the Abyss takes place below the Surface layer, it often counts as none of the biomes.
  • If the biome does not have a corresponding debuff, then the next matching biome on the list is chosen.
    • For example, if the player is in a corrupted desert, the projectile will be purple and inflict Holy Flames debuff. If the corrupt biome belongs to none of the other biomes on the list, then it would inflict the Armor Crunch debuff instead. However, if the player is in a corrupted ocean, the projectile would fully inherit the ocean effects as it is higher on the list.