Thrown Water refers to a set of three consumableweapons that each convert a small area into a biome (Hallow, Corruption, or Crimson for Holy Water, Unholy Water, and Blood Water respectively) when thrown. This conversion affects a roughly circular area with a radius of four tiles from the center. Enemies within this radius are also damaged slightly; this damage is not classified as any of the four damage types and therefore cannot be modified by any buffs or equipment.
Holy Water is only available in Hardmode. It is possible for Corrupted or Crimson Deserts to be generated naturally with the world, making the other two throwable waters available from the beginning of the game, however these biomes will not spread onto sand until Hardmode begins, therefore worlds generated without Corrupted/Crimson Deserts will not have Ebonsand/Crimsand until then. On the PC version, Console version, Mobile version, and tModLoader version, however, Vile Powder or Vicious Powder can be used to convert sand into its corrupt counterpart.
The effects of Thrown Water can be reversed with Thrown Powder.
For creating large areas of Hallow, Corruption or Crimson, a Clentaminator may be a better choice. It fires a stream of solution with a range of about 60 tiles.
Trivia[]
The Holy Water, including its sprite and the way it is thrown, is possibly a reference to the item of the same name in the action-adventure video game series Castlevania.