Summary
Built around the Coldflame Sabre, a beta item found in Shadowfang Keep that deals fire damage to frozen targets, enabling a melee 'Battle Mage' playstyle for the Mage class. Framed as 'discovering a new class,' but written coverage (Icy Veins, MassivelyOP, MMOExp) treats this as a new Mage playstyle/build enabled by a hidden item, not an actual new playable class. No outlet found confirms a standalone 'Battle Mage' class exists in WoW Forever.