 Units are classified into one of several classes : infantry , ranged , pikemen , cavalry , or siege . Each unit class has unique strengths and weaknesses , emphasizing the importance of properly matching up units in battle to increase their effectiveness . Hero units are unique in that only one of each can be created ; they consist of characters from the novel , such as Aragorn , Legolas , Gimli , Saruman , Nazgûl , Mouth of Sauron , Arwen and Shelob , or are created via the game 's Hero Creator ( only accessible via the PC version ) . If the player kills Gollum , a non @-@ player character , they are rewarded with the One Ring . The item can be used to summon one of two ring heroes for a price of 10 @,@ 000 resources , Galadriel and Sauron , depending on the player 's faction . Ring heroes have extremely strong armor and powerful attacks , making them among the game 's most over @-@ powered units . 
