Elden Ring - Black Knife Armor location

Just a quick video without voice over covering where to find this. Need to get the two sides of the medallion to pay Malenia a visit to unlock that area from the Grand Lift of Rold. Then you just run over to this area.. do the annoying "light the 4" Evergaol, and voila. Go get some daggers and you're now cosplaying as Garrett from Thief.