Clavicus Vile

Clavicus Vile is one of the seventeen most powerful Daedra known as Daedric Princes. He is best known for granting wishes, often in ways that turn out poorly for the recipient. He is the Daedric Prince of Power, Trickery, Wishes, and Bargains.

Clavicus' sphere is of wishes and eldritch deals. His dealing with Mundus (the mortal realm) are usually with individuals who wish to have something and, by summoning him, Clavicus gives it to them. However, he is known to take back his deals at inopportune times (for the summoner, not Vile). Why he does this is unknown. Clavicus is likely based on Mephistophiles from the German play Faust, since they both grant wishes, but twist them so they aren't what the wishers desired "per-se" and tend to be dangerous. He loves toying with mortals as he is often seen enjoying their pain and suffering and is seen as one of the more evil Daedric Princes.