What is the heart of the sea in Minecraft used for?

Who this is for: Minecraft players exploring ocean biomes and planning underwater builds or monument raids.


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Primary Use: Crafting Conduits

The heart of the sea serves one main purpose in Minecraft: crafting conduits. A conduit is a powerful underwater structure that provides significant benefits to players exploring ocean environments. To craft a conduit, you need one heart of the sea plus eight nautilus shells arranged in a specific pattern on your crafting table.

What Conduits Do for You

Once you’ve crafted and activated a conduit, it becomes your underwater headquarters. The conduit grants you several game-changing abilities:

  • Conduit Power effect – Unlimited underwater breathing within range
  • Enhanced underwater vision – See clearly in dark ocean depths
  • Faster underwater movement – Swim at normal speed instead of crawling
  • Hostile mob protection – Damages nearby underwater enemies automatically

How to Activate Your Conduit

Simply crafting the conduit isn’t enough. You must build a frame around it using prismarine blocks, prismarine bricks, dark prismarine, or sea lanterns. The frame can range from a simple 3×3 ring (16 blocks) up to a massive 5x5x5 structure (42 blocks). Larger frames extend the conduit’s effective range significantly.

Finding Hearts of the Sea

Hearts of the sea only appear in buried treasure chests, making them relatively rare items. You’ll need to locate treasure maps from shipwrecks or underwater ruins, then follow the map to dig up the buried chest. Each treasure chest contains exactly one heart of the sea, so plan your ocean expeditions accordingly.

Strategic Value

Beyond their crafting utility, hearts of the sea represent significant exploration achievements. They enable advanced underwater building projects, ocean monument raids, and deep-sea resource gathering that would otherwise be extremely challenging. If you’re planning extensive underwater adventures, exploring our collection of building and exploration games can help you develop the strategic thinking needed for successful Minecraft projects.

TL;DR

Hearts of the sea are used exclusively to craft conduits, which provide underwater breathing, vision, speed, and protection when properly activated with a prismarine frame.

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Joyst1ck

Gaming Writer & HTML5 Developer

Answering gaming questions—from Roblox and Minecraft to the latest indie hits. I write developer‑focused HTML5 articles and share practical tips on game design, monetisation, and scripting.

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