The Skull's Eye

is a BotW: in.

Overview
Link can access this quest by going to the Akkala Ancient Tech Lab. Once there, Link can speak with Jerrin, who will tell him that the left eye of Skull Lake is higher than the right and contains a shrine. She then tells Link he should go there and investigate this shrine. To complete this shrine, Link must go to Skull Lake and climb up the pillar protruding from the right eye. This can be easily done using the Paraglider or Revali's Gale. Once Link has climbed the pillar, he gains access to Zuna Kai Shrine, a blessing shrine. One can note that this shrine quest is technically optional, since Link can access the shrine without ever starting the quest