As Achilles knelt at the altar, Paris raised his bow. He sent a poison arrow toward his brothers’ killer and, with the help of Apollo, the arrow entered the only vulnerable part of Achilles’ body: his heel.
Realizing death was imminent, Achilles cried out (some versions of the story say he gave the command after his death) to sacrifice Polyxena on his tomb. In the arms of Odysseus, Achilles died a painful death.