To acquire a dragon shout, or to strengthen an existing shout: The Dawnguard add-on adds three new dragon shouts for players, while Dragonborn adds a total of four new dragon shouts.
You can learn a total of 20 dragon shouts in the standard version of Skyrim, but that number can be increased to 27 dragon shouts by installing official add-ons. You can use dragon shouts only after completing Dragon Rising in the Main Quest, from which point you can absorb a dragon's soul after slaying it. As the Dovahkiin (Dragonborn), a mortal with the soul of a dragon, you were born with this power. Dragons are naturally able to use dragon shouts, but very few people possess this capability. The Voice or Thu'um) are phrases of dragon language, consisting of three separate words of power, that can be used to unleash varied powerful effects.
