The Ebonrazor

In the daedric shrine of Ramimilk in between Ald-ruhn and the Ghostgate, there is a skeleton laid out on the shrine with a cursed glass dagger embedded in its chest. This mod replaces that dagger with a unique enchanted ebony longsword named Ebonrazor with an on-strike enchantment for frost damage, absorb magicka, and soultrap. When the player picks up this weapon, it afflicts the player with a curse that silences you, permanently preventing you from casting spells until you can remove it. This starts a quest to remove the curse. Your journal entry suggests talking to Divayth Fyr. He will remove the curse for you, but requires some ingredients: scrib jelly, corkbulb root, a ruby, a daedra's heart, and a skull. After giving him these ingredients, he will give you a potion to remove your curse.