K guys here's how you get in:
1: Put on the guild tag that you own on graal, then clear that tag
2: Kill 7 people (sorry saints)
3: Change your guild house to the spar gh, then to the treehouse gh
4: Use :sit, then :dance in the spar arena (anywhere)
5: Go to unstuck me
6: Now donate 376 gralats to the fountain (exactly 376)
7: Now stand in front of the door, if you did this all without going offline or disconnecting, or messing up, you say "BTN47DGX7" then walk in
No joke it's forreal, inside you get to collect 20 chests with black gralats, and a bunch of free hats and furniture