text: One of these creatures is first slain by the player at the Western Watchtower.
full_question: One of these creatures is first slain by the player at the Western Watchtower. After that battle, the player absorbs the spirit of Milmunir, one of these creatures, and gains the ability to use shouts. Another one of these creatures prevents Ulfric Stormcloak’s execution at Helgen. That monster of this type, Alduin, serves as the “main antagonist” of the game it is found in. For 10 points, name this type of monster that has “Blood”, “Frost”, and “Serpentine” varieties, from which the protagonist is “born” in Skyrim.
first_sentence: One of these creatures is first slain by the player at the Western Watchtower.