Stormrider is an exceptional unique Tabar, a type of axe from Diablo II: Lord of Destruction.
Similar to other "Storm" items like Stormspire or Stormchaser, Stormrider bestows a rather large Lightning Damage boost, as well as a chance to cast several high level Lightning Spells. Although powerful, Stormrider loses some of its bite against enemies immune to lightning, as some in Hell difficulty are.
Stats
Stormrider
Tabar
Two-Hand Damage: 83 To 229
Required Level: 41
Required Strength: 101
Durability: 90
Axe Class - Slow Attack Speed
+100% Enhanced Damage
Adds 35-75 Damage
Adds 1-200 Lightning Damage
15% Chance To Cast Level 5 Charged Bolt When Struck
10% Chance To Cast Level 13-20 Charged Bolt On Striking
5% Chance To Cast Level 10 Chain Lightning On Striking
Attacker Takes Lightning Damage Of 15
(Only Spawns In Patch 1.10 or later)
Normal Axes — The Gnasher (Hand Axe) • Deathspade (Axe) • Bladebone (Double Axe) • Skull Splitter (Military Pick) • Rakescar (War Axe) • Axe of Fechmar (Large Axe) • Goreshovel (Broad Axe) • The Chieftain (Battle Axe) • Brainhew (Great Axe) • Humongous (Giant Axe)
Exceptional Axes — Coldkill (Hatchet) • Butcher's Pupil (Cleaver) • Islestrike (Twin Axe) • Pompeii's Wrath (Crowbill) • Guardian Naga (Naga) • Warlord's Trust (Military Axe) • Spellsteel (Bearded Axe) • Stormrider (Tabar) • Boneslayer Blade (Gothic Axe) • The Minotaur (Ancient Axe)
Elite Axes — Razor's Edge - (Tomahawk) • Rune Master (Ettin Axe) • Cranebeak (War Spike) • Death Cleaver (Berserker Axe) • Ethereal Edge (Silver-Edged Axe) • Hellslayer (Decapitator) • Messerschmidt's Reaver (Champion Axe) • Executioner's Justice (Glorious Axe)