Pure Water Stone

The Pure Water Stone is an item used for spawning the boss Hydrolisk.

Other methods
Using a Water Bucket on any Rune Post will destroy the Rune Post and drop a Pure Water Stone. It should be noted that this will permanently render the specific Rune Shrine structure unusable.

Spawning Hydrolisk
The Pure Water Stone's only use is for spawning Hydrolisk.

When the Pure Water Stone is used on a Hydro Table, Hydrolisk will spawn. This will consume the Pure Water Stone. If spawned on Peaceful difficulty, Hydrolisk will despawn immediately, so it is important to ensure that the world is not on Peaceful difficulty.

History
纯水石