Whilst playing as Elendil, run towards and away from Sauron to lure him to attack you. His immense mace will become stuck in the ground. It is made from Morgul LEGO and can be destroyed by Narsil, the sword of Elendil.
When the mace is successfully attacked, Sauron will lose one heart of health. Repeat these attacks until Sauron is defeated.
