Mafia 31. Twilight Dances.

3) Rain - causes armor corrosion (-25% to attack reflection chance). Affects: Knight, Duke, Golem, blessed by the Abbot. Once every three nights, starting from the second night.

Because I didn't see it written that it lasts for only one night. To be honest, I was even afraid that with each new application, every three nights, the debuff would stack.

Not displayed: ND of the Viceroy (check), Advisor, Angel (check), Knight's Watch, Thief's Hideout. I think that's all.

You should have put this in the header.

Why I suggest the Golem as a possible candidate for who Revan was: in the legend, he was created by a sorcerer to help him ring the bell. The bell, the clock, the surveillance, all that. "Attempt to defend" is a kind of innate defense. However, this option seems rather weak to me now.

One thing surprises me. The synchronization of using Rain with the killing of a role with a defense. How did they figure out Reinhardt? That's what I don't understand. Is it just luck?

Rain debuffs the Duke, Knight, Golem, and Abbot-buff. Of these four options, the last one doesn't fit at all, the first two are potentially suitable, but they don't match the description of the killed role; only the Golem remains. As you can see, it's more likely luck than calculation.