Following the wondrous victories of Rostam and the liberation of the Iranian host, King Kay Kavus ordered a grand scribe to write a fateful letter upon fine white silk, woven with threads of hope and dread. The missive opened with solemn praise to Yazdan, the Just Creator who endowed humanity with intellect, established the rotating heavens, and bestowed capacity for both good and evil. Kavus warned the monarch of Mazandaran to take heed of how the Almighty had crushed the malevolent sorcerers and demons. He demanded that the ruler set aside his crown, travel to the Kianian court as a humble vassal, and pay royal tribute—for no mortal or demon could withstand the terrible grasp of Rostam. Should he refuse, Kavus promised that the same doom which erased Arzhang Div and the White Demon would surely claim his life.
Kavus then summoned Farhad, a renowned Iranian paladin famed for his steel blade and steadfast spirit. Farhad kissed the earth in allegiance, accepted the scroll, and rode straight toward the grim realm of Mazandaran—a land inhabited by ruthless, iron-jawed warriors. Upon hearing of the Iranian envoy's arrival, the King of Mazandaran assembled a host of his fiercest demons and champions, instructing them to adopt the fierce demeanor of leopards to strike terror into the heart of the messenger.
When the demon warriors met Farhad, their brows were furrowed in menace. One colossal demon gripped Farhad's hand and squeezed it with monstrous force, intending to crush his bones. Yet Farhad's resolve was absolute; his countenance did not pale, nor did he utter a single groan. Unbroken, he was escorted into the presence of the demon king. There, Farhad laid the silk scroll, scented with musk and wine, before the royal scribe.
As the letter was read aloud, disclosing how Rostam had slain Arzhang Div, the White Demon, Bid Div, and Pulad-Ghandi, the King of Mazandaran was overwhelmed with grief and dread. His eyes wept tears of blood as he realized the world would know no peace while Rostam lived. Mourning his fallen demon commanders, the king sat in quiet terror, realizing the storm of Iranian vengeance had arrived at his gates.