Sanctuary: Sunken Keep

From the Sanctuary, take the right exit. Head right to find the Link of Fire and Sky (Ring). Return to the Sanctuary.

Exit left from the Sanctuary. Continue left to the wall and press Circle to reveal a hidden door.

Proceed through the hidden door and pick up Stone Merchant and Pack of Salt on the ledge.

Head back inside, climb the ladder, and pick up Forestfang (10) at the top. Head left to exit outside.

Outside, defeat the Vilehawk on the platform above and the Retchfeeder that spawns below. Continue left and defeat the two Vilehawks.

Drop down using the three platforms near the obelisk. Jump left to a platform with a skeleton in the background (avoid dropping lower). Continue left until leaves obscure your character, then press O to pick up the Crystal Sphere.

Head back right and drop down to the lower platform. Move left to a lower platform to pick up the Plated Band (Ring).

Navigate the collapsing floors to the left, run right, and enter the doorway.

Inside, light your Torch. At the end of the wooden platform, pick up Light (Prayer). Return outside to the previous platform.

Descend and make your way back to the Sanctuary, using the previously skipped ladder.

Return to the area with the Vilehawks and Retchfeeders, near the black obelisk.

If the two Vilehawks beyond the obelisk are present, defeat them. You should be on the platform with stone steps.

Before ascending the steps, notice thin stone pillars. Defeat the two Vilehawks at the top of these pillars. Approach the leftmost pillar with a torch to spawn two Retchfeeders; defeat them. Climb up to get one of the Vilehawks.

Collect the Forestfang (10) on the third pillar.

Continue left, jump the gap, and proceed until you reach a ladder. The doorway to the left leads to a locked door.

Head up the ladder and collect the Stone Leader.

You are now positioned before the boss fight. You can proceed to the boss or return to the Sanctuary to prepare.