The Tribute Hall is a glorious room of trophies created by Emperor Calus in the Leviathan full of trophies you collect. A Visage of Calus is set up for 'worthy creatures to kneel before'. The Visage of Calus sells Champion Bounties, which you can use to lower the cost of Tributes, with a maximum of 4 per day. Buying 45 Tributes allows you to earn a Bad Juju Catalyst.
You can buy Tributes from the Visage of Calus at the cost of Glimmer and World Resources. The following are all the Tributes you can buy from the Visage of Calus;
Bright Dust Tributes
Hive (Alkane Dust)
These Tributes are awarded from Invitation from the Emperor Quest progress. Each is named after a Royal Beast.