In skyrim you run into an npc named Selveni Nethri who says shes been cursed and wont be able to cast magic for a while


Has this happened before in tes lore?

Is there a curse spell or did Bashnag call in a favor from a daedra?

There used to be Silence spells before Skyrim neutered "streamlined" magic.

There also used to be damage and drain magicka spells. A damage magicka over time spell or a long lasting drain magicka spell would be able to keep a caster down for quite a while.