You unlock the Root's End puzzle in Crimson Desert after completing Abyss Without Balance and continuing along the skybridge and floating islands eastwards. This tricky trial in the sky begins with a few simple jumps between platforms—easy enough.
But then you need to traverse a block bridge that moves from side to side, requiring you to wait until they align, then take it a few blocks at a time. You then teleport to another island where you're then met with another moving bridge, followed by some platforms that carry you through the sky.
