Tensions between Washington and Tehran are spiraling after a dramatic warning from Iran’s ambassador to Russia. Tehran says any attempt to assassinate Mojtaba Khamenei will trigger “severe retaliation,” as anger grows following the reported killing of Supreme Leader Ali Khamenei. The warning comes as the United States posts a multimillion-dollar reward for information on Mojtaba and senior IRGC commanders. Meanwhile, speculation is mounting about Mojtaba’s whereabouts after multiple alleged assassination attempts and conflicting claims about his condition. With revenge rhetoric rising and global powers watching closely, the shadow war between Iran and the U.S. may be entering a far more dangerous phase.