Frostburn is a unique pair of Gauntlets.
Along with Magefist, Frostburn is a pair of gloves directed towards spellcaster use. While Magefist gives a large boost to mana regeneration, Frostburn gives a very large boost to mana itself (which stacks with other items that give a percentage-based increase of mana). For most casters (especially fire-based), Magefist is arguably better, as it increases cast rate, which Frostburn lacks. The notable exception is "mana tank" Sorceress (Energy Shield-based), which will make use of Frostburn's massive mana bonus.
Stats[]
Frostburn
Gauntlets
Defense: 47-49
Required Level: 29
Required Strength: 60
Durability: 24
+10-20% Enhanced Defense
+30 Defense
+5% Enhanced Damage
Increase Maximum Mana 40%
Adds 1-6 Cold Damage, Cold Duration: 2 Seconds
Normal Gloves — The Hand of Broc (Leather Gloves) • Bloodfist (Heavy Gloves) • Chance Guards (Chain Gloves) • Magefist (Light Gauntlets) • Frostburn (Gauntlets)
Exceptional Gloves — Venom Grip (Demonhide Gloves) • Gravepalm (Sharkskin Gloves) • Ghoulhide (Heavy Bracers) • Lava Gout (Battle Gauntlets) • Hellmouth (War Gauntlets)
Elite Gloves — Dracul's Grasp (Vampirebone Gloves) • Soul Drainer (Vambraces) • Steelrend (Ogre Gauntlets)