After defeating the King of Flowing Sands and Second Rat Prince in Chapter 2, you’ll find a massive door sealed by a Tally. Interacting with it shows the message: Required: Sterness of Stone, Keeness of Tiger. These two key items are essential to progress, and each one is dropped by a specific boss you must hunt down. The Keeness of Tiger comes from the Tiger Vanguard, while the Sterness...