The Spire There are three Sync Plates that must be activated and protected simultaneously. The best way to do this is split the raid group into three groups of two members and each group activates and protects one plate. The zone can be activated by standing in the circle for a few seconds. Once the plate is activated, the Guardians must defend it from Vex, but do not need to stay in it. When all three plates are activated, a message will appear stating "the spire is forming." The zones are visible from each other, so it is possible to provide support for other groups if they are having a tough time. The plate at the top near the gate is typically the easiest to defend, so the two group members who are defending the top Sync Plate should help the others when possible. But one member should stay at the top. Praetorians, upgraded minotaurs, will spawn with Void shields here, flanked by various other Vex. The Praetorians are the only Vex that can capture a Sync Plate. If a plate is lost to the Vex, the spire will start to deteriorate. The plate must be taken back to continue to form the spire. The spire will take about two minutes to form if not interrupted. After the spire has completely formed, a beam of light will shoot from it, opening the Vault of Glass. The team can then enter. After venturing into the cave a bit, the team will come upon a chest, which can award Ascendant Materials when opened.