Minecraft wiki entry for Development_versions, associated text: Crafted with 1 heart of the sea and 8 nautilus shells.
Can be activated by placing prismarine, prismarine bricks, dark prismarine, and/or sea lanterns in 5x5 open squares around it.
When active, will give nearby players the Conduit Power status effect.
Will not create a water source block when placed
Version exclusive: When activated by 42 specified blocks, its inside texture will change again, similar to .
Version exclusive: Can be oriented in 16 different directions on top of a block like mob heads.