Ocean Monument Finder

What to know about Ocean Monuments

• BiomeOcean Monuments generate in four of the five deep ocean variants — Deep Ocean, Deep Cold Ocean, Deep Lukewarm Ocean and Deep Frozen Ocean. They do not spawn in Deep Warm Ocean, and never in shallow-water ocean biomes or anywhere else.
• Elder GuardiansEach monument has three elder guardians — one in the top room and two in the side wings. Each one inflicts Mining Fatigue III for five minutes when it spots you, and the effect reapplies as long as you stay in its line of sight, which is why a milk bucket and breaking line of sight are essential.
• Gold blocksHidden behind dark prismarine walls in the treasure chamber are eight gold blocks. Mined out, that adds up to 72 gold ingots — pure profit for getting through the elder guardians.
• Sponge roomsSome monuments contain a wet sponge room — a small chamber tucked into the top floor full of sponges growing on the walls. Mine them, dry them in a furnace, and you have a stack of dry sponges, which are the only blocks in the game that instantly soak up water around them.
• VersionOcean Monuments were added all the way back in 1.8 and they were the first proper underwater mega-structure Minecraft ever shipped.

What to bring for the dive

Conduit

A Conduit is the single best piece of preparation you can do for an Ocean Monument trip. When activated underwater inside a prismarine activation frame, it gives every player in range water breathing, underwater night vision, and extra mining speed — plus it damages hostile mobs nearby. To craft one you need eight Nautilus Shells (from drowned or fishing) and a Heart of the Sea, which is only found in buried treasure. Worth the prep.

Trident (Loyalty III)

A Loyalty III trident with Impaling V is the single best underwater weapon in the game. Loyalty makes the trident return to your hand after every throw, so you can keep firing without stopping to retrieve it. Impaling deals bonus damage to aquatic mobs (guardians and elder guardians both count), which makes a huge difference inside a Monument. Tridents are dropped by drowned holding them — fish for them in oceans before the Monument trip.

Milk bucket

A milk bucket immediately cancels the Mining Fatigue debuff that elder guardians inflict on you. The debuff lasts a brutal five minutes per hit and stops you mining most blocks at any reasonable speed, so without milk you're basically locked out of looting until it wears off. Drink a milk bucket after each elder guardian hit and you can keep mining and fighting normally. Bring at least three buckets — one per elder guardian.

Night Vision potions

Without a Conduit active, underwater visibility is genuinely awful — especially at night or deep in the Monument's interior corridors. A Night Vision potion clears that up completely so you can spot guardians, prismarine walls, and the entrances to side rooms instead of bumping into everything. Brew with Awkward Potion + Golden Carrot at a Brewing Stand. They're cheap to make and last 3 minutes per potion.

🎩 Respiration III helmet

A helmet enchanted with Respiration III adds 45 seconds to your air supply per level — that's an extra 2 minutes 15 seconds before you start drowning, on top of your normal 15-second lung capacity. It also roughly doubles your underwater visibility. It's near-essential if you don't have a Conduit yet, and still useful as a backup if you stray outside Conduit range mid-fight.

How to clear a Monument

1. Set up a Conduit just outside the Monument before you go in. Place the Conduit on a base of prismarine, then surround it with a frame of prismarine, dark prismarine or sea lantern blocks (any combination works). Once activated it broadcasts water breathing and night vision over a large radius — easily enough to cover the whole Monument structure.
2. Track down the three elder guardians. One sits in the central top room (often behind a gold block on the wall), and the other two patrol the side wings to the left and right. Kill the top one first — it has the longest line of sight on you and will keep reapplying Mining Fatigue from across the Monument until it's dead.
3. Once all three elder guardians are dead, the Mining Fatigue debuff expires and you can break prismarine at normal speed again. That's when real looting starts — until then you can do basically nothing inside the Monument, so dealing with the elder guardians always comes first.
4. Hunt down the eight gold blocks built into the Monument's treasure chamber. They sit behind dark prismarine walls in the central upper rooms, usually with an elder guardian floating in front of them. Mined out, those eight blocks give you 72 gold ingots — pure profit for the trip.
5. If you find a sponge room (only some Monuments have one), mine every wet sponge you see. Back at base, dry them out in furnaces and you'll have a stack of dry sponges — the only blocks in the game that instantly soak up water around them. With enough dry sponges you can drain the entire Monument and turn it into an underwater base or guardian XP farm.

Pair it with a coastal run

A successful monument trip goes much better if you've already done a buried treasure run for Heart of the Sea, and picked up nautilus shells from shipwrecks along the way. Conduit-powered monument clears are genuinely fun — without one they're a slog.