Mercay Island (8)

On Mercay Island, talk to Oshus to combine the blade and Phantom Hourglass into the Phantom Sword.

Head back to the Temple of the Ocean King.

Enter the gold portal to begin the descent from the 6th floor.

Go down the stairs to the 7th floor, step onto the moving platform, and head north to the safe zone.

Use your Boomerang to grab 30 seconds from the jar to the right.

Continue left onto the ringing floor.

Go south and defeat the Swift Phantom.

Head downstairs.

Immediately strike the Swift Phantom at the entrance to defeat it.

Go north, defeat the Blue Phantom, and grab 30 seconds from the jar in the northwest corner.

Go back south, cross the invisible bridge, and head north to defeat another Swift Phantom, revealing a chest with a Ship Part.

Send a Bombchu through the hole in the wall to the left to open the north door.

Go back to the stairs to the south and head down.

On the floor above, head right and defeat the stationary Phantom.

Return to the safe zone and wait for the Swift Phantom to patrol south, then strike it when it turns around to reveal a chest in the northwest corner after defeating all three Phantoms.

Go back down the stairs and across the invisible bridge, then back up the stairs to the south.

Grab the Ship Part from the chest in the corner.

Head right, cross onto the safe zone, grapple onto the chest, and grab the round crystal inside.

Carry the crystal across to the other side, then back to the southeast stairs and go down.

On the next floor, carry the crystal to the north door and proceed down again.

Drop the crystal at the entrance, defeat the two Poes in the northeast and southeast corners.

Defeat the Swift Phantom carrying the square crystal, then defeat the remaining two ghosts.

Grab the Ship Part from the chest in the corner.

Carry the square crystal to the pedestal in the northwest corner to drop the flames, then head up the stairs.

Walk onto the ledge and use your Boomerang to grab 30 seconds from the jar to the south.

Jump back down and head downstairs again.

Grab the triangle crystal from the chest.

Place the square, circle, and triangle crystals on their pedestals in that order.

Head through the door, grab 30 seconds from the jar in the corner, then head back out onto the 10th floor.

From the entrance, head right and use your Grappling Hook to climb onto the nearby ledge.

Wait for the Phantom patrolling the right hallway to pass north of the spikes, then crush it with the boulder.

Go back left and send a Bombchu through the hole in the wall to hit the switch.

Go all the way left onto the next platform and roll the boulder to crush the Phantom holding the key.

Once both Phantoms are defeated, grab the key from the chest that appears on a safe zone.

Continue south and use your Hammer to smash the rusty switch in the corner, revealing a large chest on another safe zone.

Head right and grapple across the large pit into the safe zone.

Bomb the wall to the right, then head through and defeat the first Phantom Eye.

Continue around and defeat the second Phantom Eye, then grab the small chest in the safe zone for a Big Green Rupee.

Head south again and hit the switch to lower a set of spikes.

Head down and right for a 30-second time jar.

Go back up and through the spikes, grabbing the Treasure Map from the chest.

Defeat the last Phantom Eye to reveal the large chest.

Go back around and through the spikes, then continue down through the bombed wall and climb onto the pole in the safe zone.

Grapple onto the chest and grab the Big Green Rupee inside.

Jump down to the right, then head through the locked door and down the stairs.

On the next floor, head left to defeat the Gold Phantom.

Grab the 30 seconds from the jar to the left, then head back to the entrance.

Defeat the Phantom Eye near the entrance, then head east to defeat another Phantom Eye.

Defeat the second Gold Phantom, revealing a chest in the southwest corner of the room.