Core Keeper: Atlantean Worm Boss Guide

Conquer the Atlantean Worm in Core Keeper: A Comprehensive Guide

The Sunken Sea in Core Keeper presents a formidable challenge: the Atlantean Worm. This colossal creature, while not a threat to the Core itself, poses a significant danger to players venturing into its underwater domain. This guide will equip you with the knowledge and strategies needed to successfully defeat this formidable foe and claim its valuable rewards.

Unlike other bosses, the Atlantean Worm requires a unique approach. Its open-water habitat necessitates a boat, preferably the high-speed Speeder Boat, for effective evasion and attack positioning.

Essential Gear and Preparations

Before embarking on this underwater quest, gather the necessary materials:

Speeder Boat Material	Acquisition Method
Coral Wood Plank x200	Refine Coral Wood (from Coral Wood Roots in the Sunken Sea) using a powered Table Saw.
Octarine Bar x120	Smelt Octarine Ore (mined from ore blocks, boulders, fished, or dropped by Sunken Sea enemies) in a Smelter Kiln.
Gold Bar x30	Smelt Gold Ore (rarely found in most biomes, from boulders, fishing, or dropped by early/mid-game bosses) in a Smelter Kiln.
Mechanical Part x30	Found in Treasure Chests, Locked Chests, from breaking objects, defeating Cavelilngs, boss chests, or purchased from the Cloaked Merchant.

Beyond the boat, prioritize high-quality food (Pinegrapple, Sunrice, Lunacorn, Bloat Oat) for sustained health regeneration. The Guardian Potion (12% damage reduction) is also highly recommended. Stock up on Greater Healing Potions (3 Poison Slimes, 5 Heartberries) and any beneficial buff potions.

Class-Specific Strategies

• Melee: Octarine, Galaxite, or Solarite Armor offers excellent defense. The Godsent King Set provides a balanced approach. Utilize long-reach weapons (Tentacle Whip, Anchor Axe) or those with ranged skills (Rune Song, Crystal Shard Club) to target weak points while maintaining distance. A ranged backup weapon is advisable.

• Ranged: The Tassel Set or Cosmos Armor (34.5% damage buff) are suitable choices. The Godsent King Set also works well. Weapon options include the Octarine Bow, Galaxite Chakram, Phantom Spark, or Solarite Bow. The Ninja Set boosts critical hits but is harder to obtain.

• Magic: The Scholar Set or Arcane Monk Set (Shimmering Frontier) provide strong magical defense. The Cosmos and Godsent King Sets offer damage boosts. Weapons include upgraded Fireball and Scholar Staffs, Zealot's Scimitar, or Sun Caller. The Chaos Staff (requires Pandorium, Cytoplasm, and Rift Statue) is incredibly powerful.

• Summoner: The Grim Set maximizes Minion damage and count while providing a large Mana Barrier. Alternatively, the Arcane Monk, Godsent King, or Cosmos Sets offer different strengths. Both melee and ranged summons are effective; melee summons require closer proximity to the weak points.

Summoning and Locating the Atlantean Worm

The Atlantean Worm is a roaming boss. The Atlantean Worm Scanner (Ancient Gemstone x15, Mechanical Part x15, Solarite Bar x50) reveals its location on the map.

Scanner Material	Acquisition Method
Ancient Gemstone x15	Mining Ancient Ore, breaking objects, opening chests, killing Cavelilngs or Core Sentries.
Mechanical Part x15	Breaking objects, opening chests, killing bosses, Cavelilngs, Core Sentries, or Orbital Turrets.
Solarite Bar x50	Smelt Solarite Ore (mined from nodes, boulders, killing Mimites, or mining Crystal Snails in the Shimmering Frontier) in a Fury Forge.

To summon the Worm, purchase the Bait Pillar (2,895 Ancient Coins) from the Brave Merchant (unlocked by completing the Challenge Arena in a Shimmering Frontier Alien Tech Lab). Place the Bait Pillar within 50 tiles of the Worm to initiate the fight.

Battle Tactics

The Atlantean Worm attacks with bites, spike rams, and a long-range energy attack. Its weak points (darker blue segments) must be destroyed to inflict damage. Destroying a weak point spawns a smaller worm. Weapons with piercing abilities are highly effective.

Focus on one segment at a time to manage the number of worms and avoid getting surrounded. Circle around the worms, staying near their rear for better evasion. The Speeder Boat allows for closer, riskier attacks.

Rewards

Upon victory, the Atlantean Worm Chest (or its contents) will appear. Guaranteed rewards include the Atlantean Worm Heart (permanent health boost). Other potential drops include the Atlantean Worm Sword, Atlantean Worm set, Sun Caller staff, and various other items.

This comprehensive guide provides all the necessary information to successfully defeat the Atlantean Worm in Core Keeper. Good luck, and happy hunting!

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