For centuries, Amin and MohammadMehdi have been locked in a bitter rivalry that has spanned through the ages. Both are immortals whose disdain for each other has lasted far longer than any human lifetime. Their conflict began in ancient Persia, where both were born into wealthy families during the Achaemenid era. Amin grew up with a strong sense of nationalism, which he inherited from his father, a proud Persian warrior who fought against the Greeks. He held the belief that Persia was a superior civilization, and that its people were destined to rule over others. MohammadMehdi, on the other hand, rejected nationalistic beliefs. He believed that individuals should be judged by their character, not their nationality, and that the world needed to be united under one flag. Their opposing beliefs soon turned into open conflict, as they both vied for influence over the Persian empire. They battled each other with swords and words, each hoping to prove the superiority of their ideology. But despite their differences, Amin and MohammadMehdi were evenly matched, and their rivalries endured through the centuries, as they witnessed the rise and fall of countless empires. During the Islamic golden age, Amin and MohammadMehdi continued their feud, but this time in the guise of scholars. Amin was a fervent defender of the old Persian religion, while MohammadMehdi was an Islamic theologian who sought to unite Persia under the banner of Islam. They both wrote influential treatises, but they were both determined to disprove each other's theories. Their rivalry only intensified during the Safavid era, when Persia emerged as a leading Islamic power. Amin fought against the Shia Safavid dynasty, while MohammadMehdi defended it. They both rallied armies and engaged in bloody battles, with neither side able to gain a decisive victory. Their feud continued into the Qajar era, when Persian nationalism began to take on a more modern form. As Iran underwent a series of changes in the 20th century, Amin and MohammadMehdi continued their rivalry in new ways. They both became political figures, with Amin leading a separatist movement and MohammadMehdi working towards a more inclusive Iran. They both assassinated each other a few times, but since they were both immortals, they always came back to life and resumed their struggle. Now, in the 21st century, Amin and MohammadMehdi continue their eternal rivalry, as Iran remains divided over issues of nationalism and identity. They both remain determined to prove their beliefs, but underneath it all, there is a sense that neither can truly succeed without the other. For all their differences, Amin and MohammadMehdi are forever bound together in an endless cycle of conflict.