The Witch. Revenge description:

An ancient witch from the Ukrainian town of Konotop (always believed to be a place where witches are born) has renounced her powers after falling in love with a mortal guy, but when the war starts and russian soldiers occupy the city and brutally murder her beloved, she decides to exact revenge on them, so she restores her powers and subjects her fiance's killers to some horrifying and bloody acts of retribution.