How To Obtain The Atlantean Worm Heart In Core Keeper

The Sunken Sea in Core Keeper is a massive underground ocean full of giant crabs and tentacles that fling muck. It’s guarded by an equally massive titan known as Omoroth, but that isn’t the only creature lurking beneath the glowing depths.

While it isn’t as hostile as Omoroth and holds no bearing toward The Core’s health, the Atlantean Worm is still a danger to any who brave the Sunken Sea. It won’t hesitate to hunt you down if you successfully manage to bring it to the surface, and defeating it brings you a trove of rewards – if you don’t get consumed.

What To Bring To The Atlantean Worm’s Fight

The Atlantean is entirely located in the open water of the Sunken Sea, a boat is pretty much required for this fight, regardless of your class.

Boats are crafted at a Boat Workbench, and the basic one can do the job, but you’ll want to go ahead and make the Speeder Boat, as it’s got more than double the speed of its predecessor, allowing you to evade attacks better and keep up with the boss.

Besides one of the two boat types, you’ll also want a decent supply of good food dishes, preferably ones made with mid-to-late-game crops like the Pinegrapple, Sunrice, Lunacorn, and Bloat Oat for the best health recovery over time and their buffs.

You can take the Guardian Potion to get a 12 percent reduction in damage taken from the Atlantean Worm and other bosses.

Potions are also key, and the best one available for healing will be the Greater Healing Potion, which is crafted with three Poison Slimes and five Heartberries, and you can bring buff potions as well to help your damage or defense.

Recommendations For Melee Characters

Similar to the fight against Ra-Akar, you’ll want at least Octarine Armor for this fight, but Galaxite or even Solarite will be better for raw defense, or if you want the best of both worlds as far as damage and defense, you can take some time to obtain the Godsent King Set.

Even if it’s not your primary damage type, it’s worth it to still have some kind of ranged weapon as a backup, such as the Galaxite Chakram or Octarine Bow.

Melee weapons with a longer reach, such as the Tentacle Whip or Anchor Axe, or ones that have a special skill with range, like the Rune Song or Crystal Shard Club, will be the best option for getting to the weak spots on the Atlantean Worm, but making sure you don’t get too close and risk contact damage.

Recommendations For Ranged Characters

If you’re doing Ranged Melee Damage, the Tassel Set from the Desert of Beginnings is still perfectly viable, but if you want some armor, you can also upgrade to the Cosmos Armor, as it provides a general damage buff of up to 34.5 percent, and the Godsent King Set works as well.

The Ninja Set is also great for frequent critical hits, even if it doesn’t provide a Ranged Physical Damage buff, but it can be difficult to farm due to it only coming from fishing in Shimmering Frontier water or killing Nilipedes at low rates.

For weapons, you’ll have quite a few things available for you: the Octarine Bow, the Galaxite Chakram, a fantastic ranged weapon that procs the Titan Souls’ skills frequently, the Phantom Spark if you don’t mind the exploration needed, or the Solarite Bow.

Recommendations For Magic Characters

For anyone using Magic Damage, the Scholar Set still works, but you can also upgrade to the Arcane Monk Set if you’ve started fighting the enemies in and exploring the Shimmering Frontier, and both the Cosmos and Godsent King’s general damage buff can help you out as well, while giving you plenty of armor.

If you’re willing to brave the Passage and collect some Pandorium and Cytoplasm, and have found a Rift Statue, you can also use the Chaos Staff, ​​​​​​which decimates the boss.

As for weapons, the Fireball Staff and Scholar Staff are still useful, especially if you upgrade them at an Upgrade Workbench, but you can also use the Zealot’s Scimitar for some close-range magic damage, or the Sun Caller if you’ve gotten it from Azeos the Sky Titan.

Recommendations For Summoner Characters

For those using Summons, the Grim set is still the best overall for you, as it’s got the best bonuses for Minions as far as damage and Minion Count go, and provides you with the largest amount of Mana Barrier.

If you want to do more damage on your own and don’t mind having fewer Minions, you could also use the Arcane Monk set if you’re going for Magic Damage, or, like with the other classes, use the Godsent King or Cosmos set if you prefer having Armor.

Summons will still follow you if you’re on open water and will simply float above the water, so melee-based Summons will still work even if you’re on a boat.

For your actual summons, both melee and ranged types will work, but if you’re using a melee-type like the Tome of the Dead or Tome of Ashes, you’ll need to keep closer to the Atlantean Worm during the fight so they can better target the weak points and keep up with it.

How To Find And Summon The Atlantean Worm

The Atlantean Worm is a roaming boss like Ghorm the Devourer, and follows a set oval path around the Sunken Sea, but with a much larger range than Ghorm.

You’ll want to use the Atlantean Worm Scanner to cause it to appear on the map, as this will let you track its path constantly and make it much easier to locate.

Whether you use the Scanner to find it or not, you’ll also need a special summoning item to make it surface: the Bait Pillar. This item can be bought from the Brave Merchant for 2,895 Ancient Coins, and they sell five of them at a time.

To unlock the Brave Merchant, you’ll need to find an Alien Tech Lab scene in the Shimmering Frontier with a Challenge Arena, complete the arena, and obtain the Nuclear Battery Idol as a reward.

Once you’ve bought the Bait Pillar, teleport to the Sunken Sea and use your boat to sail out onto the open water, and then watch the Atlantean Worm’s path on the map or begin sailing around until you find it and can follow it.

When you catch up with it, place the Bait Pillar down on the water within at least 50 tiles of the Atlantean Worm, and this will trigger its boss fight, making it surface and its health bar appear.

Be careful not to get trapped beneath the Atlantean Worm’s massive body as it surfaces, as it’s possible to get surrounded by its body or get caught beneath it, and end up instantly dying due to the stacking contact damage.

How To Beat The Atlantean Worm

The Atlantean Worm primarily attacks by trying to bite you or ram its spikes into you, while occasionally using a long-range magic attack where it summons a ball of energy that splits into smaller balls as they travel.

The real challenge in this fight comes in that you can only damage it in certain weak points that appear along its body as darker blue chunks of skin ​​​​​​in between its segments, and upon destroying these weak points, the Atlantean Worm will spawn another, smaller worm.

Each of these worms will do the same attacks as the original, have a similar weak point with a health bar, and will continue to spawn additional worms as you kill them.

Weapons with a piercing skill, such as the Crystal Spike Club or Solarite Bow, are great for hitting multiple segments at one time.

All the Atlantean Worms need to be killed to complete the boss fight, and there tend to be around ten worms in total throughout the fight, but once that limit is reached, killing the smaller worms won’t spawn anymore.

Try to focus on one segment at a time, as this allows you to better evade their attacks, and you can try and keep the number of worms in the fight low by only killing one at a time. Make sure to avoid getting trapped between multiple worms as well, especially since dodge skills from Off-hands won’t work while you’re in a boat.

Circle along the Atlantean Worms as they move, keeping towards their backend so you have time to see what direction they’ll go in next and avoid as much contact damage as possible.

If you have the HP to do so, you can also go in close along their side and get a ton of hits in before sailing away, but this strategy works better with the Speeder Boat.

Once you beat the Atlantean Worms, the Atlantean Worm Chest will spawn on the water for you to take from, or it may break, and the items drop on the water if the chest was hit by a leftover attack.

As a reward, you’re guaranteed to receive the Atlantean Worm Heart, one of the permanent Health-boosting items, and have a chance to get other drops such as the Atlantean Worm Sword, Atlantean Worm set, the Sun Caller staff, and minor items like Sunken Sea fish.