Granite Energy Storm

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Granite Energy Storm
Granite Energy Storm
Granite Energy Storm.gif
Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
EnvironmentGranite Cave
AI TypeGranite Energy Storm AI
Damage3570105 (Contact)
50100150 (Granite Charge)
Max Life7000980012495
KB Resist100%
Immune toCrowd Control.pngOn Fire!.pngHellfire.pngConfused.pngPoisoned.pngGranite Surge.png
"The uncontrollable epicenter of the energy surge within the granite caverns. Stimulated by dispelling Skeletron's curse."

The Granite Energy Storm is a Pre-Hardmode boss that must be fought underground. It can be considered a biome-specific boss for the Granite Cave biome.

While the Granite Energy Storm is alive, its exclusive music Eye of the Storm will play.


The Granite Energy Storm does not spawn on its own and must be summoned by the player by killing an Unstable Energy Anomaly, which spawns rarely in the Granite Caves after defeating Skeletron.

  • Killing the Unstable Energy Anomaly outside of the Granite Cave will spawn the boss normally.

Alternatively, the player may summon the boss with an Unstable Core while they are in the Granite Caves, the Unstable Core won't work if there is an Unstable Energy Anomaly nearby.


When the Granite Energy Storm spawns, it will be circled by Coalesced Energy. These serve to block attacks from the player and influence the abilities of the primary core. Coalesced Energy will respawn after a set time.


  • The Granite Energy Storm attacks the player by floating around and pausing before charging to the nearest player, though it will only perform this attack if it has direct contact of the player.
  • Once a Coalesced Energy is killed, it will become Encroaching Energy and home in on players, needing to be killed again.
  • After losing 25% life, the Core will begin shooting energy balls at them.
  • After being lowered to 35% life, the Coalesced Energy will start to spin rapidly, increasing the chance to block attacks.

In Expert Mode

  • If the core refreshes its Coalesced Energy, and some remain, they will be shot at nearby players for massive damage.
  • The energy ball attack will become rapid if no Coalesced Energy exist.
  • When below 50% life, it will start summoning Energy Conduits, which spawns an aura every second that inflicts the Granite Surge debuff.


Image Name Condition
Coalesced Energy.png Coalesced Energy Always
Energy Conduit.png Energy Conduit Below 50% health


  • Piercing weapons such as the Spine Breaker can make short work on the Coalesced Energy.


  • Buffed Granite Charge damage from 40 / 80 / 120 to 50 / 100 / 150.
  • Buffed health from 7000 / 9000 to 7000 / 9800 / 12495.
    • Now has its own music track, previously was Boss 5.
    • Sprite updated.
  • Buffed defense from 8 to 10.
    • Nerfed defense from 10 to 8.
    • Can now be summoned by killing an Unstable Energy Anomaly.
    • Buffed damage from 30 / 60 to 35 / 70.
    • Nerfed life in Normal Mode from 7250 to 7000.
  • Introduced.