Conduit

A conduit is a block that gives nearby players the Conduit Power status effect when powered by placing a certain configuration of blocks.

Conduit power
When activated, conduits give the "Conduit Power" effect to all players in contact with water or rain, within a spherical range of 32-96 blocks. This effect stops the breath meter from decreasing, gives underwater night vision and increases mining speed. Conduits can be activated in any biome and at any height or depth.

To activate, a conduit needs to be surrounded on all sides by water (source blocks, flowing water, and/or waterlogged blocks) and the conduit and water must be enclosed in an activation frame. The frame is built up of blocks in three 5×5 open squares centered on the conduit, one around each axis. Only prismarine, sea lantern and prismarine brick blocks in the frame contribute to activation. A minimum of 16 blocks are required, and produce an effect range of 32 blocks. With 21, the range increases to 48 blocks, and each subsequent addition of 7 adds 16 blocks to the range. A complete frame of 42 activation blocks thus extends the range to 96 blocks, and carries the additional advantage of damaging hostile mobs within 8 blocks of the conduit by every 2 seconds, if they are in contact with water or rain.

Other blocks used as part of the frame (including prismarine stairs, slabs, double slabs and dark prismarine) have no effect on activation, and can be omitted. Any blocks outside the frame but within the 5×5×5 cube that encompasses it likewise have no effect.

Light source
Conduits emit a light level of 15, the brightest possible light level in the game. They emit the same amount of light as glowstone, sea lanterns, jack o'lanterns, redstone lamps and beacons.

Trivia

 * When it is activated, the conduit displays the heart of the sea's texture in the center of its model.
 * An unused texture for the core, an 8x8 version of the Bedrock Edition Heart of the Sea, exists in the Conduit files.
 * Despite the conduit's small appearance, its hitbox takes up a full block.

Gallery
Aquisator Conduit