You bribe the psions, they tell the legionnaires, they tell the goblins, they mail you an invitation to the garden, you have to enter the secret code acquired only if you've met the queens fallen guards, they talk to the queens brother. Only if he tells the knights will you get the code, or if he's in a bad moon you need to capture a fallen and take its fourth arm to forge a key, for the code. That's the door taken care off. I'm still waiting for the legionnaire to tell the goblins... Can't wait till I can get those grapes :)