A mass of gold is an item in Evony TKR (The King's Return). It can be found after killing certain monsters or bosses, with some of them listed below.
The description of Mass of Gold in Evony TKR says:
Open to receive a random item.
Mass of Gold is known to drop from a number of bosses or monsters upon killing, including Senior Bayar Knight and Junior Knight Bayard.
Note: This list may be incomplete.
Mass of Gold opens up to potentially any of the following items: