Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - Enhanced Edition Sister of Mercy achievement-help pls

Hi all,

I finally finished all other achievements except this one- i tried to find a guide but the result were different-many told me that this one is bugged some described action with Madora and Forgiving trait...i tried it but not succesfully.
The exact guide what to do will be handy as i want to have all achievements.

Thanks a lot for all advices,