Storm Weaver

Type	Boss – Burrowing Enemy
AI Type	Storm Weaver AI
Damage	140 / 280 / 308 / 324 (Contact); 150 / 264 / 288 / 300 (Lightning)
Max Life	825,500 / 1,320,800
Defense	0
DR	99.99%
KB Resist	100%
Inflicts debuff	Electrified 100% chance
Debuff duration	2 seconds (Lightning)
Debuff tooltip	You cannot move

Type	Boss – Burrowing Enemy
Environment	Space
AI Type	Storm Weaver AI
Max Life	742,500 / 825,500; 1,188,720 / 1,320,800
KB Resist	100%
Immune to
Vulnerable to:
Resistant to:
Coins	30

Type	Boss – Burrowing Enemy
Environment	Space
AI Type	Storm Weaver AI
Max Life	825,500 / 1,320,800
KB Resist	100%
Immune to	All debuffs
Vulnerable to:
Resistant to:
Coins	30

Storm Weaver (Japanese: ストームウィーバー Sutōmuu~ībā) is a Hardmode boss. It drops Armored Shells, which are a crafting material required to craft the Portabulb.

Spawn[]

The Storm Weaver does not spawn on its own and requires the player to summon it with the Mechanical Weaver, causing it to rain.

Segments[]

Phase 1[]

Storm Weaver BodyArmored

Statistics

Type	Boss – Burrowing Enemy
AI Type	Storm Weaver AI
Damage	100 / 160 / 192 / 208
Max Life	825,500 / 1,320,800
Defense	0
DR	99.99%
KB Resist	100%

Storm Weaver TailArmored

Statistics

Type	Boss – Burrowing Enemy
AI Type	Storm Weaver AI
Damage	80 / 128 / 160 / 176
Max Life	825,500 / 1,320,800
Defense	0
KB Resist	100%

Phase 2[]

Storm Weaver HeadUnarmored

Statistics

Type	Boss – Burrowing Enemy
AI Type	Storm Weaver AI
Damage	180 / 360 / 396 / 418 (Contact) 150 / 264 / 288 / 300 (Lightning)
Max Life	742,500 / 825,500 1,188,720 / 1,320,800
Defense	0
KB Resist	100%
Inflicts debuff	Electrified 100% chance
Debuff duration	2 seconds (Lightning)
Debuff tooltip	You cannot move

Storm Weaver BodyUnarmored

Statistics

Type	Boss – Burrowing Enemy
AI Type	Storm Weaver AI
Damage	120 / 192 / 224 / 250
Max Life	742,500 / 825,500 1,188,720 / 1,320,800
Defense	0
KB Resist	100%

Storm Weaver TailUnarmored

Statistics

Type	Boss – Burrowing Enemy
AI Type	Storm Weaver AI
Damage	100 / 160 / 192 / 210
Max Life	742,500 / 825,500 1,188,720 / 1,320,800
Defense	0
KB Resist	100%

Behavior[]

It will begin to rain when summoned into battle, and much like other bosses who have a similar effect, it will not occur during the Boss Rush event.
Storm Weaver has 31 / 41 / 51 / 61 segments in total.
The Storm Weaver does not enrage if the player leaves the Space layer, and can be fought anywhere once summoned.

Attacks[]

Phase 1[]

Storm Weaver behaves like an airborne worm enemy, slowly following players and attempting to ram them for damage.
The Storm Weaver's body and head are nearly immune to all damage; the only way to deal significant damage is to hit its tail, which has 0 defense.
- Damage dealt against the tail is multiplied by 10.
- The tail will glow brightly to let players know that it's the boss' weak point.
The body will reduce the piercing power of all projectiles to 1.
Throughout the entire fight, periodically summons orbs that fire bolts of lightning at nearby players. Lightning will flash in the background before lightning bolts are fired.

Phase 2[]

Transitions to Phase 2 at 80% HP.
The Storm Weaver will shed its armor and reveal the flesh underneath; it will have no defense whatsoever in this phase, but compensates with higher speed and increased damage.
The body reduces the damage of piercing projectiles; the more the projectile can pierce, the less damage it will do.
At 5% HP, significantly slows down and loses all lightning attacks.

In Revengeance Mode[]

Storm Weaver moves faster.
Lightning inflicts Electrified.
Periodically turns a dark blue color, which gradually turns into a lighter shade. Then Storm Weaver charges directly at the player, summoning lightning from above as it does so.
- The lightning will be shot from the direction Storm Weaver is charging from.
Charges more often as its health decreases.

In Death Mode[]

Has more segments and is physically larger.
Damage dealt against the tail in phase 1 is multiplied by 3 instead of 10.
Charges more frequently.

Resistances[]

All Phase 2 Storm Weaver segments take reduced damage from non-minion piercing projectiles. Projectile damage is divided by the number of times it pierces and infinite piercing deals 50% damage.
All segments reduce damage from grenade-type projectiles by 80%. A list of affected projectiles is below.

Resisted grenades
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On top of this, all segments take:
- 75% damage from the Molten Amputator and its Molten Globs.
  - In addition, the Molten Amputator's pierce is updated to 6 (9 if stealth strike) if it contacts a segment.
- 50% damage from the Pristine Annihilation, Elemental Axe and Dazzling Stabber Staff.
- 40% damage from the Wave Pounder's explosions.

Notes[]

Storm Weaver's health does not change in Revengeance Mode. It is the only boss aside from King Slime where this is the case.
Storm Weaver has the highest health out of all of the Mechanical Bosses.
In Phase 1, Storm Weaver does not have Damage Reduction like other bosses, instead, its head reduces any damage taken to 0, and its body reduces any damage taken to 1.
In Storm Weaver's second phase, it is possible to have it endlessly circle the player due to its more restrained turning pattern. However, it is ill advised to do this as it doesn't stop Storm Weaver from summoning lightning and hitting the player.
- This only works in normal mode.

Tips[]

For more elaborate strategies on defeating Storm Weaver, including weapon and arena recommendations, see Guide:Storm Weaver strategies.

Stay on the ground and don't panic if you're almost dead. Panicking will often lead to you trying to outrun the Weaver, which is not possible.
Mobility is the key to this battle. Although it's hard to outrun the Weaver, using dash abilities or the Rod of Discord or Normality Relocator can save you from the massive damage caused by its head.
Gravity Normalizer Potions can be used to counteract the low gravity in Space allowing easier maneuverability.
For the first form use piercing weapons and weapons with a large blast radius, as these can help hit the tail of the Weaver. You can easily out-maneuver the first phase with Seraph Tracers by circling around the Storm Weaver while being in space. This method also helps dodge the Weaver's summons and fired laser beams.
The orbs that Storm Weaver fires do not deal contact damage, only the lightning bolts themselves.
Homing weapons are recommended for Phase 1 as they can easily hit the tail.
The Elemental Shiv is recommended for this fight due to the homing capabilities and the amount of projectiles it produces.
The Telluric Glare does good damage to Phase 2 with its piercing and ignoring immunity frames.
Nuclear Fury is an excellent choice with homing capabilities allowing it to easily hit the tail in Phase 1 and swarm weaver with typhoons in Phase 2.
The Shattered Sun does good in Phase 1 as it homes in on the tail, but Molten Amputators excel in Phase 2.
Elemental Axes are an excellent choice quickly dispatching the Storm Weaver.
While the Storm Weaver can be fought before any other post-Moon Lord boss, it is recommended to fight it after Providence is defeated, as its fast speed and high damage can make the fight very challenging.

Trivia[]

Storm Weaver's theme is a segment from Servants of the Scourge, which was composed by the artist DM DOKURO.
- This theme contains a motif from The Devourer of Gods' theme.
- If the Calamity Music add-on mod is disabled, Boss 3 will play instead.
According to the lore, The Devourer of Gods is the same species as the Storm Weaver, meaning that it likely has the same type of flesh underneath its armor.
The Storm Weaver, along with Ceaseless Void and Signus, can be summoned right after the Moon Lord is defeated, as their summoning item only requires Solar Fragments, Luminite Bars, and Unholy Essences.
Prior to the 1.4.5.004 update, the Storm Weaver used to spawn Stasis Probes when hurt, similar to The Destroyer's spawning Probes.
Internally, Storm Weaver is referred to as StormFemboy, a common joke among the community. Prior to this, it was called SormWaver.
If the Boss Checklist Mod is installed, its unique despawn message will be "Storm Weaver hid itself once again within the stormfront."