Cost of 100 dark elixia and combines with a dragon on its own the dragon rider has similar stats to a barbarian but when combined with a dragon it gives the dragon a 10% attack bonus and gives you the ability to decide what building the dragon what building to attack first I.E. Mines,elixia collectors, air defence, archer towers, and so on or a grouping of buildings like resource buildings or defensive buildings and so on this is level 1 of this troop and goes up in % respective of level thanks for reading I await people response



