Spirit Temple

Age	Child and adult (both halves are required)
Entry	Desert Colossus, past Gerudo Valley, Gerudo's Fortress and the Haunted Wasteland; afterwards reachable with the Requiem of Spirit
Dungeon items	Silver Gauntlets (chest, child side) and Mirror Shield (chest, adult side)
Small keys	5
Boss key	Boss Key chest
Mini-boss	Iron Knuckle
Boss	Twinrova (Koume and Kotake)
Reward	Spirit Medallion (Nabooru) and a Heart Container
Gold Skulltulas	5

As an adult, cross the broken bridge in Gerudo Valley with Epona or the Longshot.
In Gerudo's Fortress, rescue the four captured carpenters to receive the Gerudo Token.
With the Gerudo Token you can have the gate to the Haunted Wasteland opened. Cross the quicksand river at the start with the Hover Boots or the Longshot, then use the Lens of Truth to see the Poe that guides you through the sandstorm.
At Desert Colossus, Sheik teaches you the Requiem of Spirit.
Return to the Temple of Time, become a child, and play the Requiem to warp to the Colossus.

Inside the entrance, Nabooru asks the child to fetch the Silver Gauntlets for her.
Only a child fits through the small crawlspace. Work through this side (you need a way to hit switches from a distance, such as the Slingshot or Boomerang) to reach the Silver Gauntlets chest on one of the Colossus' hands.
Right after you get them, Nabooru is captured by Koume and Kotake. The Gauntlets are too big for a child – return as an adult.

With the Silver Gauntlets, the adult can push the large block in the entrance hall and enter the adult side.
Many puzzles use sunlight: shine light onto sun-face symbols to open doors. Once you have the Mirror Shield, you can reflect light beams onto them.
The Mirror Shield chest is on the other Colossus hand, reached after defeating an Iron Knuckle. Iron Knuckles hit very hard; strike them and back away, and wait for an opening after each swing.
One Iron Knuckle turns out to be Nabooru under Twinrova's spell.
Near the end, reflect light onto the face of the giant statue to open the path to the boss.

Phase 1: Koume (fire) and Kotake (ice) fly around the room. Use the Mirror Shield to reflect one sister's blast into the other – Koume's fire hurts Kotake and Kotake's ice hurts Koume.
Phase 2: They merge into Twinrova, who alternates fire and ice blasts. Block blasts with the Mirror Shield; after it absorbs three blasts of the same element, release the stored energy at Twinrova.
When she falls onto one of the platforms, get to her quickly and attack her with your sword.