Sasa Kai Shrine

Sasa Kai Shrine is one of many shrines found in The Legend of Zelda: Breath of the Wild. It is inaccessible until the Shrine Quest Sign of the Shadow is completed, upon which it will emerge from the ground near an ancient platform just southeast of Gerudo Tower.

"A Modest Test of Strength"
This shrine contains a "modest" test of strength. Multiple shrines contain tests of strength ranging from "minor" to "major" - modest is the middle ground. The only difference between tests of similar difficulty are the weapon set used by the Guardian you are tasked with defeating; in this test, the Guardian is equipped with both a Sword and Spear. Once it is defeated, a door on the far end of the chamber opens revealing a chest containing a Frostblade and the monk Sasa Kai who rewards Link with a Spirit Orb.