Amity makes an "I got my eye on you" gesture towards Edric and Emira when they put "Hex me" signs on Willow, Gus and Amity's backs. This is the same gesture Katara makes in Season 2 Episode 6 of Avatar: The Last Airbender (2005) when she tries to intimidate some guys. Amity and Katara are both voiced by Mae Whitman.
King says at one point, "No one ever said power comes with responsibility." This is a fun tribute to Uncle Ben's oft-quoted aphorism to his nephew Peter (Spider-Man) Parker that "With great power comes great responsibility."