Adaptational Context Change: In the show, the Whispering Death and Screaming Death eggs were placed on Berk by Mildew and the Outcasts. Here, the culprits are Eret and Arny.
An Aesop: Leadership doesn't mean you solve every problem yourself.
Beach Episode: The chapter is set on the Madrigal's day off, everyone (except for Mirabel) spending a family day at the coast.
Call-Back: In Chapter 70, Valka managed to pacify a highly territorial dragon (Pepa's Skrill) using nothing but hand-gestures. This chapter ends with Antonio doing the same to a hostile Submaripper, having asked Valka to teach him how to do it.
Running Gag: Augustin tries cooking — in this case, cooking meat on the grill — only for it to get ruined.
Sea Monster: The spontaneous whirlpools causing problems for the Encanto's fishers is a Submaripper, a territorial Tidal-class dragon.
Warp Whistle: It's implied that the Encanto is far from the coast that the Vikings had sailed to. By now, the Miracle's magic allows its citizens to teleport between the Encanto and the Beach at will.
Wham Episode: The chapter ends with Hiccup finally proposing to Mirabel. She says yes. It also ends with Eret and Arny placing Whispering Death eggs in a cave on Berk. Including one particularly large one.
