After lighting all four blue flames and finding the Chess Room in Blue Prince, you may have noticed there's a breakable wall ...

There are four puzzles inside the book “A New Clue” in Blue Prince: “Low case clue” puzzle — Hidden on page six in tiny font.

Of course, you'll still be able to loot and utilize whatever weaponry you can scavenge while running throughout Limveld in Elden Ring Nightreign. Picking the Ironeye won't limit you to just bows ...