This quest is not available in game.
Maintain your reputation with the Gelkis, and bring a Draenethyst Shard to Uthek the Wise in the Gelkis Village in Desolace.
You have more to prove, and your next task will take you far, so for now the Gelkis will fight the Magram without you.
The earth whispers many secrets to those who listen. One secret I hear is of a red crystal. It is called draenethyst, and it is new to our earth. It comes from a place where mountains fly, and where demons rule.
Bring me a shard of draenethyst, and it will make my magic strong! The shard is in a place called the Swamp of Sorrows, held by the lost one Ongeku.