Did you catch this prophecy in 'House of the Dragon' Season 2, episode 1?

The ending of House of the Dragon's Season 2 premiere features one of the most heinous things to ever happen on the series, Game of Thrones included.

In a sequence already infamous to readers of George R.R. Martin's Fire & Blood, Daemon Targaryen (Matt Smith) hopes to avenge the death of Rhaenyra's (Emma D'Arcy) son Lucerys (Elliot Grihault) by claiming "a son for a son." He enlists the help of two unlikely assassins: a member of the Gold Cloaks (Sam C. Wilson) and a ratcatcher (Mark Stobbart).