After freeing the Spirit of Wisdom, you can go farther into the Temple of the Ocean King.
Back to the Temple of the Ocean King
Go south from the temple, then make your way southwest to reach the ship. Talk to Linebeck to leave.
You can visit the Traveler's Ship and train with him to get a treasure. Then you can return and try to beat your high score to get more points.
You can also visit Bannan Island in the northeast of this area. If you go to the house in the northwest part of the island, you can talk to the Wayfarer. He will ask you to tell him if you find any mermaids.
If you go into the cave, you can bomb the cracked wall and go through to reach an area on the east side of the island. There, you can talk to the guy at the table to play the Cannon Game. If you get 2500 points or more, you get a bomb bag upgrade. After that, you can get rupees and ship parts if you win.
Then sail south. You can just go directly south this time.
The Temple of the Ocean King is on Mercay Island, so sail there.
Go toward the temple. On the way, you can bomb the blocks at the top of the stairs to make a shorter path to the temple. Go west and you can bomb the cracked wall. The cave inside has a treasure chest with a Power Gem inside.
Go to the temple and go down the stairs in the center to reach B1.
Temple of the Ocean King B1
Go to the northeast corner and use a bomb to get rid of the cracked blocks on the left. Go west and step on the switch, then go west to get the key. Take it to the northeast door and open it to go downstairs.
Temple of the Ocean King B2
Go southwest of the Phantom that is standing still, and use the boomerang to hit the two crystal switches. This makes the key appear. Then go east and put a bomb on the other side of the cracked wall south of the stairs that you came down. Go through the wall that opens, then go down and step on the switch and use your boomerang to get the key (since the spikes come back up if you step off of the switch).
Go south and then west, and go up across the blue tiles. Go to the right and hit the crystal switch to lower the red blocks. Then go northwest to the locked door, open it, and go down the stairs.
Temple of the Ocean King B3
Go to the southeast of the room and use the shovel to dig up the sand. An air vent appears, so you can float up it to reach the switches on the ground. Step on a switch to make a trap door appear under the Phantom when it is in one of the corners. Then drop down and get the key.
You need to take the Force Gems to the pedestals in the northeast of the room. One Force Gem is in the southeast corner, one is behind the locked door near the southwest corner, and one is in the northwest corner.
There are a couple of gold pots that you can use to add time to your hourglass. One is in the northeast corner behind some cracked blocks that you can bomb, and one is against the north wall near the northwest corner.
After putting all three Force Gems in place, go north through the door that opened.
This room is safe, so your hourglass won't count down while you are here. After the cut scene, tap the door above you, and Neri will open it. Go down the stairs beyond the door.
Temple of the Ocean King B4
There are Phantom Eyes patrolling this room. Unlike Phantoms, you can kill Phantom Eyes.
Go east, then south until you are standing close to the southern gust of wind. Use the boomerang to hit the crystal switch, turning off the air gust. Use the boomerang to stun the Phantom Eye, then hit it with your sword while it is stunned.
Go northwest until you are near the northwest area where the Phantom Eye is patrolling. Hit the eye with the boomerang, then kill it with the sword. If you get caught, run to the northwest corner and hit the red pot to create a safe zone.
Then go to the safe zone in the middle of the west wall, and use the boomerang from there to stun the Phantom Eye south of you, then kill it with your sword. A chest appears on the east side of the room after you kill all three Phantom Eyes.
Go to the southwest corner of the room and use the shovel on the nearby pile of dirt to open an air vent. Float up the air vent and hit the crystal switch to deactivate the wind gust in the upper-right of the room.
Go north from there and bomb the cracked wall, then go through the hole that you made. Hit the crystal switch to lower the spikes on the east side.
Go east to the area where the spikes went down. Talk to the skeleton if you wish, then take the key.
Go east from there to the treasure chest that appeared when you killed all of the Phantom Eyes. It contains a Power Gem.
Now go to the middle of the southern part of this area and unlock the door there. Go down the stairs beyond the door.
Temple of the Ocean King B5
Go west when the spikes go down. Then use the boomerang on the crystal switch in the bottom-left corner when the spikes go down. When you hit the switch, the spikes to the east go down. Go to the southeast corner of the room to find a gold pot that restores 30 seconds to your hourglass.
Now go west from there, then north. The door will lock, and some electric chuchus will attack. Kill them to open the two doors in this area and open the path to the gold pot on the left, which restores 15 seconds to the hourglass.
Go east to a room where you have to defeat Miniblins. Kill them all, and the doors will open, and you can also reach a gold pot on the right that restores another 15 seconds to the hourglass.
Go north from this room, then use the boomerang to hit the crystal switch in the northeast corner. This reveals a treasure chest that contains a red potion, and it also turns off the gust of air.
Go west. You can't reach the northwest corner, so just go down the stairs.
Temple of the Ocean King B6
This floor has a red door in the middle of the southern area. You need to read the tablets around the room to learn the symbol that you need to write on the door. Or you can just scroll down and click the "Click to Show" button to see what the symbol is without having to read the tablets in the room.
Don't read the middle tablet on the left.
Go to the safe zone in the northeast corner and read the tablet, then write the number on your map.
Go to the southeast corner of the room and hit the switch to lower the nearby spikes. Read the tablet behind the spikes and write the number on your map.
Step on the switch to the left, then go west and step on the switch on that side. This turns off the wind next to the red door in the south part of the room.
Bomb the blocks in front of the southwest tablet. Try to kill the Phantom Eye in this area as well. Then read the southwest tablet and write the number on your map.
If you killed all of the Phantom Eyes, the spikes in the middle of the west wall are lowered, so you can reach the golden pot there.
As mentioned earlier, don't read the middle tablet on the left. It makes more Phantom Eyes appear in the room.
Go to the northwest corner and dig up the dirt there, then put a bomb in the air vent, and when the cracked blocks break, float up on the air and hit the switch. If you need a safe zone, go to the west and hit the red pot.
After hitting the northwest crystal switch, go to the northwest tablet and read it.
Then go to the red door in the middle of the southern part of this area and tap it. Draw the crest based on the information from the tablets.
The symbol is
Go north through the door.
This room is safe. The hourglass will not count down.
Go north and tap on the sun door. It says to press the sea chart, so open the Southwestern Sea chart, then close your DS. When you reopen it, the symbol will be transferred to your sea chart.
Ciela tells you to ask Linebeck what it means. A blue warp point appears, so walk onto it to leave the temple.