When tidings reached King Kay Kavus that the demon host had drawn a tight siege around the Iranian camp, he commanded Rostam to gird his loins first for vengeance. Tus, Gudarz, Giv, and Gurgin marshaled the battle lines, and the royal pavilions were raised upon the plains of Mazandaran. Tus commanded the right wing and Gudarz the left, while Kavus held the center, with the elephant-bodied Rostam striding ahead.
From the ranks of Mazandaran emerged a champion named Juyan, bearing a colossal mace. Sent by the Sorcerer King, he rode before the Iranian lines, roaring defiance and demanding a duel. His voice thundered so fiercely through the valley that even the bravest Iranian warriors froze in silence. Kavus reproached his heroes, but none dared step forward until Rostam reined in Rakhsh, sought the king's blessing, and charged into the arena like a raging elephant wielding a dragon-like spear.
With a lion-like roar, Rostam struck Juyan beneath his belt, piercing armor and mail. He lifted the demon champion clean out of his saddle like a bird upon a spit, casting his broken, blood-filled body upon the dust. Panic rippled through the Mazandarani forces. Their king ordered a relentless, total assault using fierce leopard tactics. For seven full days, the sky turned indigo and the earth pitch-black under a barrage of maces, arrows, and swords, as warhorses navigated a sea of blood.
On the eighth day, King Kavus laid aside his Kayanian crown, prostrated himself in tears before Yazdan, and prayed for divine glory and triumph. Reinvigorated, the Iranian heroes—Giv, Tus, Gudarz, Gorazeh, Rohham, and Rostam—launched a ferocious counteroffensive that broke the demon army. Rostam charged straight for the Sorcerer King of Mazandaran. Terrified by the sight of Rostam's spear, the demon king used dark magic to transform his body into an impenetrable boulder.
When the strongest Iranian warriors failed to budge the stone, Rostam effortlessly lifted the giant rock, carrying it directly to Kavus's royal tent. Rostam threatened to crush the boulder into dust with his heavy mace unless the sorcerer revealed himself. Yielding to fear, the king emerged in full armor. Remembering the dark captivity and blinding of his troops, Kavus ordered the executioner to hack the Sorcerer King into pieces. After three weeks of thanksgiving, distribution of spoils, and celebration, Rostam reminded Kavus of his pledge to Evlad. Kavus granted Evlad the throne and crown of Mazandaran with a sealed royal decree, whereupon the victorious Iranian host set out for Pars.