Once you unlock the new song, go to Lanayru Desert and pick North Desert as your landing point. Go to the far north, in front of the building that hosted a power node. Play your harp in front, where the butterflies are. Thrust your sword in the ground to start the second trial.
When you gain control of your character rush up to the stairs and grab the first tear. Continue up to the entrance of the facility and make your way around he outer ring. You will find three tears around this ring. The temple has a broken wall on the south side which you can use to get up to the upper level. Use the vines on the east side now and get to the top, and the next tear. Jump down to the entrance, and as you go down, jump on the left edge, to where the generator is. Grab the tear here, then jump back. Go back to the starting point, and head east across the submerged path - you'll see a tear to your left as you reach the first crossroad.
Continue on that path until you reach the east most area. You can climb up this wall from the west or the north side, and grab the tear. If you turn west, you'll see the next tear at the end of the nearby wall segment, blocked by two Watchers and a Guardian. You have to wait for the first Watcher to go as far away as possible, then rush forward and "hide" on the extruded section on the right. Wait for it to pass again, then rush forward and grab the tear. It doesn't matter of the second Watcher spots you, you'll reach the tear before the Guardian can catch you.
Now head south and you'll see a tear just out of reach, with a minecart halfway submerged in water which you cannot step into. Wait for a bit until the water recedes, then push the minecart underneath the tear. Be careful though, the water comes back quickly, rather do it in 2-3 pushes than risk getting killed.
Go even further south and climb the wall with the help of the minecart to the right. Head back north along this wall, and jump off at the cages. Push the minecart towards the cage and climb up to get the next tear. Go around and climb up the nearby wall segment for another easy pickup.
Head back down the wall and turn left. You'll see a tear on top of the tree in the far south, roll into the tree to make it fall down. The last one is tricky - it's located up the path leading to the desert entrance, but it's surrounded by Watchers. You'll have to carefully navigate through them to avoid being spotted, or alternatively, you can wing it and make a run for it.
Once all the tears are collected, head back to the entrance.
Go around the western side, to the three statues, one which hid a power node. Continue along the hidden path to the wall and use the clawshot to pull yourself up. Go to he wall with the Moblin, and leap above it (Or kil it if you wish so). Drop down to the bird statue and pull yourself up to the gappling point on the north edge. Hop in front of the sand... waterfall (sandfall?) and pull yourself up.
Talk to the Goron here and go through the locked door. Clawshot your way across the gap by grabbing the grappling points on the pillars. Once you're on the other side, simply head forward and enter the sand sea. Go down to the ship and activate the timeshift stone.
Enter the boat and make your way to the X mark on your map. Exit and go right, grappling yourself up to the high pillar. Grapple to the hovering sack plant, and from there to the ledge. Bomb the wall on your right and go through. Again grab the hovering plant and make your way up to the very top (plant-point-plant-point). Cross the bridge and graple your way to the northern pillar. Use the whip to pull out the plant and grapple to it.
Wait until it gets close enough to the grappling point and pull yourself up there. Go around the path to the top. Use the Beetle to kill the Deku Baba above the next grappling point, the pull yourself to it. Go up to the next pilar from there.
Kill the two birds and pull yourself to the plant on the east side. Wait for it to raise enough, then switch to the next one. Pull yourself one last time to the house and enter. Clear the sand until you find a chest, and take the sea chart from it.
Exit and go right and use the ziplines to get down to the boat. Go to the west, to the X on your map, and get off. Once inside the shipyard, go right and kill the Lizalfos. Enter the minecart building and hop onto a minecart. Ride both that, and the next minecart (Be careful of dead ends), and enter the door in the final room with the Bird Statue.
Drop down and, using the bellows, clear the sand mound in the middle. The Aracha fight is nearly identical to the original boss fight. Refer to the boss guide for further information.
Go outside, talk to the captain, then head north to the Pirate Stronghold.
Go around the right side, drop down and enter the door.
Keep moving onward until you reach the Timshift Orb. The path is pretty straightforward, just be careful in the Beamos room. In order to get the chest along the way, put the orb down before it restores the lasers blocking it.
In the next room, make your way up the slope on the other side and hop along the restored stones to reach the corridor leading to the next chamber. Once you reach the gate, drop the orb in front of it, pass to the other side and pull the lever to open the gate, allowing you to pick up the orb again. Cross the next room, and go through the corridor. Now head left, place the orb down (So it doesn't reach the door, and by extensions, the lasers) and enter the small room. Push the block onto the switch and go through the now unlocked door.
Go left, into the room with the two Beamos, and place the orb on the right side, the west wall, so that its aura removes the barbed wire in the other room. Go back to where you were, and head left, to said west room. Pull the lever and take the orb. Revive, and defeat the two Armos, go through the passage and place the orb onto the pedestal.
Go outside and back onto your boat. The ship you're looking for is invisible and moving along the desert. Dowse for it, and once you find it, shoot it with the canon (The projectile trajectory will show if you're hovering over the side of the ship, you can use that as a guideline). Hit it three times to make it stop and get aboard.