Fiyr remains will always reward the player with either a silver or gold shade key, or some coins. Silver and gold keys give unrestricted access to all areas of the shade tombs, and the silver keys open the silver rewards chests in the Fiyr area of the tombs, which give the best common rewards out of all the chests. Gold chests can only be opened by gold keys, but may offer some specific loot otherwise unobtainable.