Spire

The Spire is a Vex construct that is used to open realms that are normally sealed outside of time and space, such as the Black Garden in The Garden's Spire Story mission or the Vault of Glass. They first appear as a pillar of white energy forming from the ground up, then solidifying into a rock tower that opens the sealed realm being accessed. They can either be opened by a Gate Lord's eye or via Sync Plates.