Heart of the Sea

From Minecraft Wiki

A Heart of the Sea is a rare aquatic-related item used for crafting conduits that were added in 1.13 - The Update Aquatic.

Source

Hearts of the sea can be found inside treasure chests, which could (in theory) be discovered randomly. However, players can easily locate a hidden treasure chest by following an exploration map. These maps can be found aboard sunken shipwrecks, crafted with a cartography table, or bought from cartographer villagers in exchange for a compass and some emeralds. Feeding a dolphin with raw cod can lead players to nearby sunken shipwrecks.

Usage

Currently, the Heart of the Sea's sole purpose is for use in the crafting of conduits which are like underwater beacons that give players within its proximity buff effects.

Crafting

Conduit
Nautilus Shell Nautilus Shell Nautilus Shell
Nautilus Shell Heart of the Sea Nautilus Shell
Nautilus Shell Nautilus Shell Nautilus Shell


Trivia

  • In the game files, it's referred to as the Nautilus_Core, a reference to the Nautilus Shell, an item also used in crafting a conduit.

Video