What spirit can make someone feel regret?

[Dagoth]

What spirit can I call on to make my ex feel regret for his dumb actions?

[Mulberry]

Spell to make someone feel deep remorse

Furcas can make someone feel guilty for their wickedness. In the book Angels of Wrath by Gordon Winterfield, there is a ritual to Bring Judgement ie make someone feel deep guilt and regret for the harm they have caused.