This quest is not available in game.
Bring Lethtendris's Web to Talo Thornhoof at Camp Mojache in Feralas.
The blood elf Lethtendris has overstepped her bounds. So eager was she to gather magical power that she defied her brethren and created a device of insidious design, a web meant to siphon the tainted magical energies of Dire Maul. Even now she gathers those energies and plans to release them against her enemies.
Lethtendris must be stopped. Find her within the Warpwood Quarter of Dire Maul, defeat her and bring her web to me so that it might be returned to more clear-headed blood elves for study.