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1.
Alduin is the gigantic evil dragon in Skyrim who wants to eat your face.
“I used to be an adventurer like you, then I took an arrow in the knee”
“Well I used to be a guard like you and took an Alduin in the face!”
by BlueHuskeyDawg August 02, 2012
 
2.
The enourmous dragon that's trying to kill you throughout The Elder Scrolls V: Skyrim.
"Zu'u Alduin!" -Alduin
by SkyrimIsForTheNerds May 29, 2014