Kill the Slitherscale Lizard-Lord.
The Slitherscale take orders from their leader, the Slitherscale Lizard-Lord. He can be found celebrating his victories on the southeastern corner of Windward Isle.
If we can destroy this leader, we can deal their tribe a great blow.
Without their lord, the Slitherscale will think twice before attacking the gentle cloud serpents of the east.