The Other Side
From Destinypedia, the Destiny wiki
The Other Side is a secret Quest found in The Tribute Hall aboard the Leviathan when the player places a total of 18 tributes. Completing this quest awards the player the Bad Juju Exotic Pulse rifle. This quest is found within the center of the Tribute Hall in a class case containing the Bird Skull (or projection of the Pulse Rifle when completed) once all 5 Royal Beast tributes are placed (final one is unlocked with 18 Tributes Placed, including the Beasts themselves).
Toland, the Shattered: Paracausality! What a trip. If you believe your weapon wants to murder all existence, then so it will. Call it a little bad juju, if you please...
Toland, the Shattered: Inflict your desires upon reality, Guardian. One good death deserves another.
Toland, the Shattered: I leave you here.
Toland, the Shattered: Claim what has been lost.