Pearls of wisdom

"A pearl of wisdom (pow/pearl) is a great item collected from chaos chest or rarely dropped from shadow giants (sg/shadow invader/si). Used for forging with enchanted forge"

usage
By using the enchanted forge the first thing you should see is a pearl and the equipment of choice. Using the pearl will grant a randomly chosen fourth stat, if there is already a fourth stat it will boost the stat (which is why it cost so much on the Market place.)