DOTA 2 currently features 126 heroes, the newest of which being Kez (Bird Samurai). Most of these heroes are based off of pre-existing heroes from the first Defense of the Ancients. Some heroes such as Monkey King, Pangolier, Dark Willow, Grimstroke and Mars are entirely new heroes not found in the original version of DotA.
Heroes are separated into groups according to their alignment, as well as their main attributes, Strength, Agility, Intelligence and Universal.