Joku-usin Shrine
In this guide to the shrines in Zelda: Tears of the Kingdom, you'll find the complete solution to the Joku-usin Shrine, with all the puzzles and chests you'll come across.
You'll find this shrine located on Thunderhead Isles, the place you'll visit when you're completing the main quest: The Secret of the Ring Ruins. To access this sanctuary, located within a structure, you'll need to advance across the island. Simply build a platform with a turbine to cross the rail and use Infiltration power when you're underneath the structure to climb inside. Once in front of the Sanctuary entrance, activate the magic circle to enter and be able to teleport to this location next time.
Once inside, you'll be disarmed. This means you won't have access to your equipment. Collect the equipment on the left-hand side of the room and move inside to face the Soldier Constructs. It's also possible to collect Lightning Fruits, as there are 2 trees at your disposal.
Attack the Soldier Constructs and collect their equipment and weapons as you go, so you can attack other enemies. At the far end of the room is a platform with a Lightning Launcher. Use Fuse to merge it with the weapon you have and attack. You'll notice that you do much more damage when you strike with this fused weapon.
Once all the enemies have been defeated, collect the resources and climb up. Open the chest in front of you to retrieve an Electro elixir (level 3) and head for the magic circle. Activate it to receive a Light of Blessing.
Try to complete as many Shrines as possible in order to receive all the Light of Blessing and accumulate as many Heart Receptacles as possible or Stamina from the goddess statue.