Stallord is the final boss of the fourth temple in Twilight Princess, Arbiter's Grounds. His full name is: Twilit Fossil: Stallord. Upon entering the boss chamber, Link can see Stallord's fossils in the sand. Zant comes and tells Link it is amazing he is still alive, and will not be alive much longer. He then summons a black sword, and stabs Stallord with it. Stallord gets up and roars at Link. The boss battle has began.
This boss battle requires the spinner to defeat the boss. You must go towards Stallord spine with your spinner and jump into his spin. Once you have hit him three times, he will fall. All the sand in the area will subdue, leading Link into thinking Stallord is dead. But that was just round 1! In the second phase, Link must jump from wall to wall on the rails, until he gets close enough to Stallord who is in front of Link shooting fireballs at him. He must hit Stallord with the spinner until he has died. Link can now collect the Heart Container and go to The Mirror of Twilight.