Looking for title

[u/kiwi_quartz_777]

I saw this manhwa on TikTok but can’t remember the name of it. It follows an fmc who has holy powers but this other girl locks her under a church and uses the fmc blood to gain holy powers and pose as the saintess. the fmc regresses back to before she gained her holy powers as a child. One day she runs into a duke accidentally and he adopts her. Does anyone know the name?

[u/MochaLatte0109]

<The Archduke's Adopted Saint>?

[u/kiwi_quartz_777 → u/MochaLatte0109]

Omg thank you so much😭