Under the leadership of Thrall, the Orcs have rediscovered their ancient Shamanistic traditions. In an attempt to rid the Horde of its demonic corruption, Thrall banned the use of Warlock magic and necromancy. Now, all Orc magic users practice Shaman magic which draws its power from the natural world and the elements.
Primary spellcaster. Can initially cast Purge, which slows and dispels positive and negative buffs. Can also learn Lightning Shield and Bloodlust. Attacks land and air units.
The Orc Shaman is one of the most powerful spellcasters besides the Human Sorceress. The Shaman is powerful because of his Bloodlust ability mainly. Shamans can Bloodlust any friendly organic unit, including allied units, Orc units, and themselves. They cannot Bloodlust mechanical or magic-immune units like Demolishers and Dryads. You can further enhance this damage with Heroes and a Kodo Beast. Shamans can also slow escaping enemy units with Purge and wreak havoc with Lightning Shield on shadowmelded or tightly packed groups of enemy units. There are several methods of using Shamans. Many players build Grunts then work up to Shamans and use the two together. Shamans are also good when used with Wind Riders, or with Tauren, or with both.
Remember to research Adept and Master Training. Besides just giving extra spells, these upgrades also increase mana capacity and mana regeneration, which is exactly what you want on spell casting units.
Spells & Abilities
Purge is useful for removing enemy spell effects. An example would be enemy Sorceresses Polymorphing your units.
Use Purge to prevent enemy units and Heroes from running away
Lightning Shield is useful for casting on groups of tightly packed enemy units. Cast Lightning Shield on an enemy unit surrounded by other units. The enemy player will be forced to move this unit away or it will kill off or damage surrounding units.
You can also cast this on your own units but be warned that good enemy players typically run away until it wears off.
Like in Warcraft II, Bloodlust is one of the uber spells in the game. Orc players should almost always try to build up to Bloodlust because it can greatly enhance their Grunts, Tauren, or Wind Riders.
It's best to turn off the autocasting of Bloodlust when you don't need it. That way your Shaman will have built up Mana for Bloodlust, Purge, and Lightning Shield