House of the Dragon isn't particularly interested in most of the mystical aspects of its source material. Game of Thrones rarely indulged in its warlocks and incantations, but it was a bit more willing to explore. Aside from the supposed prophecy, House of the Dragon rarely mentions the weird and wonderful aspects of Westerosi lore. Daemon's experience in Harrenhal was a unique example of the show tangling with strange lore. Just before Daemon watches a Game of Thrones highlight reel, he sees a bizarre figure with a prominent pair of antlers in the godswood.