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EnvironmentAstral InfectionSurface
Damage50 / 100 Expert Mode / 150 Master Mode (pre-Astrum Aureus)
85 / 170 Expert Mode / 255 Master Mode (post-Astrum Aureus)
Max Life300 / 600 Expert Mode / 900 Master Mode (pre-Astrum Aureus)
450 / 900 Expert Mode / 1350 Master Mode (post-Astrum Aureus)
Defense14 (pre-Astrum Aureus)
24 (post-Astrum Aureus)
KB Resist40% / 46% Expert Mode / 52% Master Mode (pre-Astrum Aureus)
50% / 55% Expert Mode / 60% Master Mode (post-Astrum Aureus)
Inflicts debuffAstral Infection (debuff)Astral Infection
100% chance

Debuff duration1.25 seconds
Debuff tooltipYour flesh is melting off
Immune toAstral Infection (debuff)ConfusedPoisoned
BannerAries BannerAries Banner
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.pngVulnerable
Not to be confused with XF-09 Ares, a mech in the Exo Mechs boss fight.

The Aries is a Hardmode enemy which spawns on the Surface Astral Infection biome. It leaps quickly towards the player with both small and larger strides.


  • The BestiaryBestiary entry for the Aries: "These creatures bound across the landscape endlessly, chasing down any intruders that dare enter the hive mind’s home. The star’s power has bestowed them limitless stamina, rendering them unable to feel exhaustion."


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Now has 25% less health and 10% less damage in Master Mode.
  • Fixed its bestiary entry using the wrong apostrophe.
  • Decreased Astral Infection duration from 1.5 seconds to 1.25.
  • Decreased Astral Infection duration from 2 seconds to 1.5.
  • Now vulnerable to heat debuffs, but resistant to sickness debuffs.
  • Fixed its death sound not playing.
  • Now inflicts Astral Infection for 2 seconds on contact.
    • Now gains increased stats, equivalent to old stat values, after defeating Astrum Aureus.
    • Now drops Stellar Knife after defeating Astrum Aureus instead of Astrum Deus.
    • Nerfed health from 450 / 900 Expert Mode to 300 / 600 Expert Mode, damage from 85 / 170 Expert Mode to 50 / 100 Expert Mode, defense from 24 to 14, and knockback resistance from 50% to 40%.
    • Increased delay between when its hit sound can play.
    • Increased minimum coin drop amount from 3 Silver Coin.png 80 Copper Coin.png to 10 Silver Coin.
    • Increased volume of hit and death sounds.
    • Fixed all sounds not playing properly.