You’ll find the pieces to restore this pillar in El Ciclo and Wetlock, both in the past and the present. Restoring it will teleport you to Providence, where you can continue the main story.

Warning: This guide contains minor spoilers for Dragon Quest VII.

Finding the first fragment

The first fragment is in El Ciclo in the present time. You’ll find the new island sailing to the south of Greenthumb Gardens. 
When you arrive at the island, enter the town of El Ciclo and go to the house where Salvador used to live in the past, in the southwestern corner of town. You’ll find the Green Fragment in the basement.

Finding the second fragment

Recommended level: 24

Exit El Ciclo and go east, where El Studio de Pomposo used to be. You’ll enter the new El Monumento de Pomposo, a giant puzzle tower.

To cross the first floor, step on the buttons on the northeastern and northwestern corners. Doing this will open the gate to the next floor.

On this floor, take the west path and step on the sliding tiles. Be careful not to fall into the pit in the end, and keep following that path. You’ll fight some Prancing Pillars, but they’re even weaker than common enemies. 

After exiting the room and reentering through the second entrance, let yourself fall on the pit and step on the button to reach the next floor.

You can take the Dragon Eye from the dragon statue and use it on the next statues to turn off the flames, but you also can just cast Safe Passage on yourself and walk without taking any 

damage. This floor is just a straightforward path.

On the next floor, you’ll find four statues with switches. Step on each switch once, and then step on the top left and the bottom left switches to continue to the next floor.

On this last floor, you’ll need to find four hidden switches. The first one is on the northwestern corner behind a pillar. The second switch is across the damaging tiles to the right. The third switch is inside a room to the west that is a bit hard to see if you don’t turn your camera. The last switch is where the statue that disappeared was before.

After pressing them all you’ll get access to the treasury, where you’ll find a Seed of Wisdom, a Mini Medal, and the Green Fragment you were looking for. Also make sure to grab the Yellow Fragment on the other side of the room.

Finding the third fragment

Recommended level: 25

You’ll need to restore the fourth Yellow Pillar and enter Wetlock island to get the next two fragments. 

When you get teleported there, walk south to enter Hardlypool. Sleep at the inn and the next day everyone in town will disappear. Head down the stairs on the southeastern corner of the town.

Follow the tunnel until you exit on the other side of the mountain, keep walking south, past the church, and enter Spilt-on Sea. Sleep at the inn and everyone will disappear here too.

Exit Spilt-on Sea and head northeast to reach Wetlock. After a brief cutscene, sleep at the inn there and head to the portal that appeared in the center of the town.

You’ll be teleported to Highendreigh Tower. Ignore the stairs in your starting room, exit through the eastern path, and then take the path northeast to find the stairs to the next floor.

Head south, move the lever to open up a shortcut in the middle, and then go up the stairs on the southwestern corner of this floor.

Use the level to open the gate and you’ll find all the citizens that were disappearing on this floor. Head upstairs on the northeastern corner and talk to Riffer. Pick the first choice when he asks you a question to get a Prayer Ring.

After this, go back to the second floor, which is now inundated, and you’ll find a ship on the eastern side. Get on it.

You can sail the boat to the inundated Wetlock and Spit-on Sea to talk to the people, and they’ll tell you where you need to go. Your next location is the shining circle in the sea, a bit to the west of Spit-on Sea. 

Inspect the statue in the middle to open up a passage. Go down the stairs and follow the main path until the end, to reach a couple of puzzle rooms. 

The first room is fairly straightforward. You need to press the first two buttons, then take the bridge north and press the next button.

In the next room, go clockwise pressing the first five buttons, skip the sixth one and press the seventh button. You’ll be back at the start of the floor. Head east again and this time the bridge to the south will be up, allowing you to reach the next floor.

You’ll be in the throne room, and a fight will start against three Sunken Spirits. They’re fairly easy and the party will be healed up afterwards. The real boss fight will begin then.

Gracos

1400 HP, can act twice per turn, can cast Chilly Breath, Jolly Roger and Venom Mist.

Riffer will join you in this fight. If any of your party members has Insulatle, cast it immediately to defend your entire party from Chilly Breath. Gracos is immune to Sap, Dazzle and most debuffs, so don’t try them on him.Keep your party buffed with Insulatle and Kabuff, and have Maribel or Ruff healing your party with either Multiheal or Hustle Dance. Doing this he should go down in more or less 10 turns.

After beating Gracos you’ll appear at the tower. Head back to the first floor and before taking the portal, Riffer will come and give you the third Green Fragment.

Finding the fourth fragment

After saving the island, take the teleportal to go back to Wetlock and speak to the mayor, on the second floor of the northwestern building. He’ll let you access the treasury.

Exit the building, step on the raft behind it, and ride it to the west until you reach a door. Speak to the guard in there and he’ll let you enter the treasury, where you’ll find the last Green Fragment. Make sure to also open the chest with the Mermaid Moon.

You got all the fragments now! Zoom back to the Shrine of Mysteries and place them on the top right pillar whenever you’re ready to visit Providence.