Three of Coins

The Three of Coins is a material sold by Xûr with the release of The Taken King. These coins are stackable up to 5 and each one increases the chance of Exotic Engram drops by Ultra Class bosses. The drop rate recorded is on average ~25% or 1-2 exotics per stack. With the Hot Fix 2.0.0.4 released 9/27/15 the Coins now now offer a sligtly smaller drop chance, as well as offer a time cooldown. The coins can be used during this cool down but offer a significant decrease in drop rate. Some players reccomend to complete another activity such as a Crucible match to ensure the time peroid is past to maximize profit.