Khamenei’s assassination terminates an epoch of ideological confrontation, yet inaugurates profound uncertainty. Legally and normatively, it imperils protections for sovereign leaders; strategically and politically, it probes Iran’s institutional fortitude; religiously and narratively, it unveils unifying and divisive societal forces. Diplomatic containment—through intermediaries such as Oman or Qatar—must prioritise the transition's fragility without incitement. Absent such prudence, this strike risks catalysing a wider regional conflagration, where initial tactical triumphs yield enduring strategic costs.