Reading online about a fifth chest in the Vault of Glass that only spawns if you prevent the Templar from teleporting. But how in the world do you keep him from teleporting? In my previous play through at least one guy had the Templar teleport on top of him. Any ideas?

Stand in the circle when it says 'The Templar is attempting to teleport!"

I think he knows that part, Cody.

Standing in the Templar's teleport target circle is only the first part. Controlling the circle will turn the circle blue and then eventually remove the circle. This blocks his teleport and causes him to attempt a new location, starting the process again. You have to actually clear the circle away to prevent the teleport, so waiting too long before jumping into the circle is a recipe for being teleported onto.

Our group got pretty good at blocking his teleports yesterday; it helps to have callouts for each of his potential locations, and the back corners can be tricky to see. That said, when the Templar can't teleport, he can be burned down pretty quickly!

Also, standing in the Templar's teleport target will make him very angry, so Ward of Dawn and Relic shields are critical for mitigating incoming damage on the teleportation points.

Reading online about a fifth chest in the Vault of Glass that only spawns if you prevent the Templar from teleporting. But how in the world do you keep him from teleporting? In my previous play through at least one guy had the Templar teleport on top of him. Any ideas?

Stand in the circle when it says 'The Templar is attempting to teleport!"