Invoker is Dire (scourge) intelligence hero introduced in Dota2 Patch (19/01/12) update. He’s one of the most powerful spellcaster heroes in Dota 2 who can deal massive Area of effect damage, disables and summons. His three elemental reagents can be combined to invoke 10 different abilities and each ability has it’s own function. Invoker can play different roles ranging from supporter, ganker to carry.