In the episode’s shocking climax, Percival enacts the final plague: the death of the firstborn. After symbolically suffocating Nana Rose, the "oldest living firstborn child" in Riverdale, a wave of death sweeps through the town.
: Major characters who are firstborn children, including Archie Andrews, Jughead Jones, Toni Topaz, and Fangs Fogarty , drop dead instantly during the reception. Riverdale s06e18
: Percival systematically inflicts horrors upon Riverdale, including rivers of blood, swarming insects, lice, and painful boils. This culminates in a literal darkness falling over the town. In the episode’s shocking climax, Percival enacts the