Raising the Giant Pillar

Stray Fairy #6: Return to the Main Room, go to the bottom, and step on the switch in the lava pool while using the Goron Mask. This will spawn a chest with the Stray Fairy in another lava pool.

Stray Fairy #7: Go to 1F in the Main Room, shoot the ice in front of the doors with a Fire Arrow, and proceed through either green door. Defeat the three Freezards to spawn a chest containing the Stray Fairy.

Raise the Giant Pillar: Stand on a middle platform to see three unlit torches. Light them quickly before they extinguish to open the central door. Enter, use the Goron Mask, and perform a Ground Pound on the switch to raise the Giant Pillar.

Stray Fairy #8: From the Main Room, fall down and run back up the steps to exit through the blue door if necessary. Drop down, use the Goron Mask to navigate the lava, climb the ladder, and return to the Entrance Room. Continue through the light blue door, defeat the two White Wolfos, and melt the ice. At the west end, use a bomb to break the crate atop a pillar and collect the Stray Fairy with the Great Fairy's Mask.

Stray Fairy #9: Step on the switch you just unfroze to spawn a chest. Push the nearby block North, East, then South. Climb the block to reach the chest and collect the Stray Fairy.

Stray Fairy #10: Move the block West, North, then West. Climb the block and move the platform to go through the door. If you moved the block earlier, leap across to the chest. Otherwise, hop down, move the block into its slot, then leap across to claim the Stray Fairy.