So, i got the newest DLC and playing around finishing some quests and for the first time in this playthrough i meet the Faint-Hearted Knight on the road. I duel him for his Sword, win and get a Stalwart (???). Kinda disappointed i decide to choke him out and see what else he got. Between his usually stuff i find a key called Secret Rattay Door Key and i am super confused, never seen this Item before. Which door does it open? Anyone know anything about it? I have collected many keys already so i can't really go around Rattay and test which new doors are there which i can easily open now, but i guess that is one thing i have to try.