I decided to try the Vault of Glass mission the other day. I got out to Venus and in the area, couldn't figure out what to do. The Ghost didn't pipe up and tell me anything like "You'll need people in each of those circles." or something. I'm only surmising this is how the gate is opened because yesterday, while there, I saw 6 players come in and it looked like 2 each went into the combat circles and when the tower was built, it fired a beam and opened the gate.
Is that the only way it can be opened? If so, atleast have the Ghost say something, or make it possible by moving blocks into the other two, or something.
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I'm sorry to say this but in the grimory cards it says, "The vault of glass cannot be opened alone." The minimum requirement for opening the vault is two players who are bona fiable bad asses.