Spire of Soaring puzzle walkthrough in Crimson Desert

The Spire of Soaring puzzle in Crimson Desert is part of the "Toward the Nest" quest in Chapter 5. Following your first confrontation with Crowcaller, which took you from Hernand Castle and the Axiom Archive all the way to Demeniss, you must now reach Crowcaller's abyssal boss arena, which leads through the Spire of Soaring and the Crescent Skybridge. There's just one problem; the Spire of Soaring has a hidden entrance.