Gaibon, bloody zombie.

After passing through the red loading doors, you enter a new area. Proceed left by jumping on platforms. You will encounter Skeletons and Blood Skeletons (which reappear after being defeated).

At the end of this path, a globe behind spikes contains a Hide Cuirass (+2 Defense). Stand on the platform button above to lower the spikes and collect it.

In the next room to the left, navigate upwards to the right to bypass a spike trap. More Blood Skeletons are present. The room to the right is a save room.

After saving, go upward to the left, passing an inaccessible elevator. Encounter Knights who throw axes; these can be blocked or destroyed with weapons.

Defeat two more Skeletons. Instead of proceeding left, drop down from the platforms by standing on one, pressing down on the D-pad, and pressing 'X'.

On the ground, a globe contains a Leather Shield. Equip it for its advantages. Return to the previous room and go through the door on the left.

In the next room, jump upwards. A breakable wall on the far left leads to a secret room with a Heart Max Up.

Leaving that room, the second secret room is below the middle platform. Attack diagonally down-left or down-right (hold down + direction, then attack) to break the ground. Descend to find a Life Max Up.

Hit the candle on the middle platform to obtain the Knife sub-weapon (use by holding UP and pressing Square or Circle).

Ascend the room, jumping precisely between platforms. In the next room, defeat a Skeleton and break a globe for a Resist Thunder item.

Continue up the vertical room. In the next area, a Spittle Bone enemy spits poison. Attack it from the stairs by the door.

Advance to a box between spikes. Activate buttons on both sides to lower spikes. Push the box onto the marked spot on the right, then jump over it and activate the switch again to reach the upper platform.

Continue upwards and through the door on the right. This path leads to a Cloth Cape (+1 Defense). Return to the room with the box and spikes.

Re-enter the room with the box and spikes, being mindful of respawned enemies. Advance left, jumping on platforms and defeating Knights.

Enter a massive vertical room. Save in the parallel save room if desired. Climb to the top.

At the top, the door on the right leads to a boss fight. A candle in the middle above the platform contains the Ax sub-weapon.