Atlantis - Official Calamity Mod Wiki

The Atlantis is a Hardmode wand which is dropped by the Leviathan and Anahita. It shoots halberds which pierce and travel through walls, in a distinct pattern consisting of one halberd in a straight line, then two halberds connected in the shape of a V, heading outwards from the player in a straight line.

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all hardmode calamity bosses put into one : r/CalamityMod

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Not happening : r/CalamityMod

Atlantis Terraria Calamity: Revengeance [17]

Crabulon but awesome (and also really tall) : r/CalamityMod