Dragonborn

Menace Haste Draconic-partner
While Dragonborn is on the battlefield you can't cast Alduin
Dragonborn gains a Dragon soul when a dragon leaves the battlefield for any reason, dragon souls are required to learn the first word of shouts
You must have Dragonborn on the Battlefield to use Shouts (Feim Zii Gron, Raan Mir Tah, Fus Ro Dah, Joor Zar Fruul)