An Israeli airstrike in Syria took out a top Iranian commander Monday, prompting Iran to ominously warn Israel that it will “pay the price,” according to Tehran’s state media. Seyed Razi Mousavi, an adviser in Iran’s Revolutionary Guards who helped coordinate Tehran’s ties with Syria, was killed by an Israeli missile in Sayyida Zeinab, a Damascus suburb not far from a Shiite shrine, IRNA, Iranian state media said. Iran vowed to retaliate. “This act is a sign of the Zionist regime’s frustration and weakness in the region for which it will certainly pay the price,” Iranian leader Ebrahim Raisi said,...