This guide shows the complete walkthrough of the Rutafu-Um in The Legend of Zelda: Tears of the Kingdom, released on 12th May 2023. Rutafu-um Shrine (Rauru’s Blessing) is hidden inside The Northwest Hebra Cave and is locked behind a shrine quest. This guide explains where to find The Northwest Hebra Cave Crystal location to unlock the shrine.
The location of the cave is marked below. Head into the Hebra Mountains Northwest Cave and jump into the hole. Once at the bottom take out the enemies on the other side of the lake.
Once defeated head up the hill to activate the shrine and it will reveal where the fragment is. The crystal is at the bottom of the freezing pond within the cave.
Attach an Icicle to a rock, then quickly attach it to the crystal, which should rise. You can then grab it with Ultrahand to the shrine.
Alternatively, create ice platforms by combining a weapon with an ice block or by fusing arrows with Ice Fruit. Use the platform to form a bridge leading to the center of the lake. Utilize Ultrahand to retrieve the crystal from the water.