Conduit

A conduit is a small, waterlogged block.

Usage
Conduit can be used like a beacon, to give all players within 47 blocks of the conduit itself (they must be in a water block) the "Conduit Power" effect. You can create this by adding at least 16 blocks around it in one of the 58 valid block spaces. The three valid block types are prismarine, sea lanterns, and prismarine bricks. It also needs to be in the center of a 3x3x3 cube of water sources or flowing water. It has the ability to damage nearby hostile mobs. Conduit power stops the breath meter from running out, gives underwater vision and increases mining speed.

Trivia

 * When it is activated, the conduit displays the heart of the sea's texture in the center of it's model.

Gallery
Sauerstoffröhre Conduit