Originally Posted by
Kisho
You get the coins by doing dailies. Each daily gives you 1-2 lesser coins. 90 of these form 3 big coins, which are used in raids for a chance at extra loot. You can only get 3 per week though, as it is a weekly quest to exchange 90 lesser coins for 3 big coins.
When in a raid, every time you down a boss you get a window pop up. This window has a button; click it and you'll perform the extra roll. Or you can pass, if you want to use your coin elsewhere.
If you use the coin, the game rolls to determine if you get an item of loot, or some gold. Either outcome is deposited into your bags automatically. This extra loot is something from the boss' loot table, suitable for your current spec. So you won't get healing plate when specced protection as a paladin, for example. The game will not check if you have the item already; you can win the same item multiple times.
You can only use 1 coin per boss kill. However, in LFR mode if you do it more than once you can use your coin on bosses you're normally not eligible to receive loot for. So if there was a specific item you REALLY wanted, you could keep running LFR and using your coin on Will on the Emperor every time he dies to try and get the hunter bow, for example.
Hope that helps. Any further questions?
---------- Post added 2012-10-30 at 02:56 PM ----------
Works in normal/heroic too.