This quest is not available in game.
Maintain your reputation with the Gelkis, and bring 10 Crude Charms to Uthek the Wise in the Gelkis Village in Desolace.
The Kolkar centaurs think their magic is strong. They do not know magic! They would not know magic if it bit them!
You will show them their magic is weak. Go to the Kolkar to the northeast and kill them. Take their charms. Bring me the charms and I will throw them in the fire and laugh!