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Map icon
Damage100 / 129 / 195 (Contact)
124 / 216 / ??? (Prismatic Bolt)
Max Life41,000 / 69,700 / 88,866
KB Resist100%
Immune toPoisoned.pngAcid Venom.pngConfused.pngFestering Wounds.pngBlood Corruption.pngBlood Infusion.png
A fractured sentinel built millenia ago to protect the land from those who would dare to scar its natural form. Now, it seems you have made yourself its target.

Atlas is a Hardmode boss. It is intended to be fought after Golem, and before the Lunatic Cultist. However, the encounter is entirely optional and does not prevent the player from progressing.

While Atlas is alive, its exclusive Music will play.


Atlas does not spawn on its own, and requires the player to summon it with the Stone Fist. It can be summoned anywhere, at any time.


Atlas is a relatively slow boss, who lets its arms do most of the physical attacking. Atlas' arms cannot be damaged. Upon being summoned, the sky will immediately turn a fully opaque gray, and a message will appear in the chat: "The earth is trembling". Atlas spawns far above the player, drops down an arm as a surprise and shakes the screen which is completely visual, and then floats down to the player's level, beginning the fight. It fires out Prismatic Bolts, among many other projectiles.


  • Atlas swings its arms at the player, attempting to deal damage.
  • Atlas fires bursts of 6-7 Prismatic Bolt.png Prismatic Bolts at the player.
  • At 75% health, Atlas summons a ring of 5 Cobbled Eyes that rotate in a circle near itself, which fire Miracle Beam.png Miracle Beams alongside the Prismatic Bolts. Its arms swing farther and faster.
  • At 50% health, Atlas summons a ring of 10 Cobbled Eyes in a slightly further proximity from itself more. Miracle Beams are fired from them much more often, and its arms swing even faster and farther.
  • At 25% health, Atlas summons a ring of 41 Cobbled Eyes much farther away from itself, these ones moving significantly faster than the others.
  • At 10% health in Expert Mode, Atlas fires Prismatic Bolts twice as fast.


  • Atlas's defense increases linearly from 48 to 83 as its health gets lower.
  • Atlas does not drop any money in Normal Mode, but the Treasure Bag always drops between 7 and 11 Gold Coins.
  • During the fight, all players are inflicted with the Unstable Affliction debuff, which decreases movement speed by 10%.


  • Now drops a Master Mode relic and a pet item.
  • 1.4.3: Now immune to Venom, Poisoned, Confused, Festering Wounds, Blood Coruption, and Blood Infusion.
    • Increased defense from 38 to 48.
    • Decreased Expert damage from 165 to 129.
    • Decreased Expert life from 94,095 to 69,700.
    • Resprited.
Characters: Wrathful Soul.png Pre-Hardmode Enemies • Ancient Tome.png Hardmode Enemies • Bloomshroom.png Event Enemies • Scarabeus (Map icon).png Bosses
Blossmoon.png Critters • Gambler.png Friendly NPCs