As you progress, the environment becomes more dilapidated, leading to the entrance of a ruined castle. Here, you'll encounter Fleamen, small, agile enemies that jump erratically. They are best dealt with by attacking them as they land or using a well-timed sub-weapon. Watch out for Bone Pillars that shoot fireballs; destroy them quickly or dodge their projectiles. There's a section with crumbling platforms; move quickly across them to avoid falling. A Holy Water sub-weapon can be found in this area, which is excellent for clearing groups of ground enemies. Before the boss, you'll usually find a large heart to replenish your sub-weapon ammunition. Ensure you have a full health bar and your preferred sub-weapon before entering the boss chamber.
