Long before Angkor's canals silted up and its temples fell silent, something was already poisoning the empire's heart. In this episode, Lucas and Luna dig into the strange, little-known story of the Krabei River valley—a lush grove of lueang trees whose sap, when it drips into the water, turns lethal. They trace how the Khmer kings, from Indravarman III to Jayavarman VIII, unknowingly built their capital beside a natural toxin, and how the local people, the Kuoy, learned to harvest that poison for hunting and arrows. But when the city expanded and groundwater rose, the poison seeped into the moats and reservoirs, sickening soldiers and weakening the state at its most vulnerable moment. New archaeological work from the Greater Angkor Project and the Phnom Dek Archaeological Project has found traces of the poison in sediment cores, reigniting a debate: was this a slow environmental disaster or a deliberate act of warfare? The hosts weigh the evidence, from Sanskrit inscriptions to Zhou Daguan's travelogue, and ask whether the Khmer Empire's collapse was less a single siege or drought, and more a tangled web of poisoned water, dwindling iron, and shifting trade—a story that ends not with a bang, but with a slow, toxic drip.