Stormspire is a Unique Giant Thresher in Diablo 2 Resurrected (D2R). This elite Polearm has a quality level of 78 and a treasure class of 87. This is the only Unique item in the game that has X% Chance to cast Level X Chain Lightning when struck attribute. The Desert Mercenaries can equip this melee weapon.
StormspireStormspireGiant Thresher
Two-Hand Damage: 100 - 140 to 285 - 399
Required Dexterity: 140
Required Strength: 188
Required Level: 70
Increased Melee Range: 4
Base Attack Speed: -10
5% Chance to cast Level 5 Chain Lightning when struck
2% Chance to cast Level 20 Charged Bolt when struck
+30% Increased Attack Speed
+(150 - 250)% Enhanced Damage
Adds 1-237 Lightning Damage
+10 to Strength
Lightning Resist +50%
Attacker Takes Lightning Damage of 27
Trade items on d2trader.net

How to obtain Stormspire

The fastest way to get this item on Battle.net is via trading, you can use the Item Price Checker to see how much Stormspire is worth.
Farming it by killing monsters is possible, check the drop rate table below for more information.
It can also be gambled but the chances are very slim.

Stormspire drop rate table

The monster with the highest drop chance of dropping Stormspire is Baal on Hell difficulty in The Worldstone Chamber of Act 5. Farming the monsters listed below gives you the highest chance of finding that item.

Stormspire variants

Below is a list with different variants of Stormspire. See the stats of its normal, ethereal or upgraded variant.