In any event, the Celestial Dew you need to perform the ritual can be obtained through several methods. There's a shop selling it in the vicinity of the Ainsel River, or Pidia at the Caria Manor in northern Liurnia. You can also obtain the dew the traditional RPG method: by looting the dew from corpses. You'll be able to find some if you begin searching through specific corpses found in The Uhl Palace Ruins Nokron, Night's Sacred Ground, Nokstella, and Raya Lucaria Academy. The least punishment you can get to take a demon's life you know? You monster.
In terms of NPCs The NPCs are easier to find now as the latest Elden Ring update also added handy NPC icons to the map. If you're in some sort of a gruesome mood and searching for potential victims, take a gander at your map. (Again You're the ultimate monster.) It is not the case that all NPCs can be restorable take note. So think very, very carefully before trying to cheap Elden Ring Runes kill any of them.
The Wall