The Villainess Wears an Idiot’s Mask

The Villainess Wears an Idiot’s Mask manhwa is also known: 악녀는 백치가면을 쓴다. The Villainess Wears an Idiot’s Mask manhwa is released in 2021 and you can read it on the website SAWAMICS.COM
– Summary :
A great mage acting as an idiot to get revenge
On the day of an unwanted wedding, Winsty awakens as a great mage and is resurrected from the danger of being poisoned.
She gets in a contract relationship with the duke of a rival family in order to stop the constant attacks of his parents and her cousin who harmed him while aiming for the position of the lord.
She wears an idiot’s mask to regain honour and rights.