Conduit

The Conduit is a powerful underwater block that grants the Conduit Power effect, providing water breathing, night vision, and increased mining speed to players within range. It is crafted using 8 Nautilus Shells and 1 Heart of the Sea in a 3×3 crafting grid and does not generate naturally. A Conduit must be activated by placing it within a frame of Prismarine, Dark Prismarine, Prismarine Bricks, or Sea Lanterns. The size of the structure determines its range, with a maximum effect radius of 96 blocks when fully surrounded by 42 blocks of Prismarine.

When activated, the Conduit emits light and damages hostile mobs within a range of 8 blocks, making it useful for underwater bases and ocean exploration. A Conduit can be mined with any tool, but pickaxes break it the fastest.