Hoard of the Dragon Queen/Rise of Tiamat
Gauntlets of the fire dragon
+3 Gauntlets of fire
You can use a bonus action to speak the command word, causing flames to erupt from them when they are worn. These flames shed bright light in a 40-foot radius and dim light for an additional 40 feet. While they are ablaze, it deals an extra 4d12 fire damage to any target
it hits. The flames last until you use a bonus action to speak the command word again.
These Gauntlets also are needed to hold the sword of the fire dragon.