Hydro Pump

The Hydro Pump is a Hardmode ranged weapon that is purchased from the Diverman after defeating Abyssion, The Forgotten One. It uses Bottled Water as ammunition, firing an arching stream of water, similarly to weapons such as the Aqua Scepter, that pierces through up to 6 enemies. It has an unlisted 80% chance not to consume ammunition.

Trivia

 * The name of this weapon is a reference to the move of the same name.