Deviate Eradication
Kill 7 each of Deviate Ravagers, Deviate Vipers, Deviate Shamblers and Deviate Dreadfangs.
Kill 7 each of Deviate Ravagers, Deviate Vipers, Deviate Shamblers and Deviate Dreadfangs.

Ravagers and vipers are near the start; shamblers and dreadfangs come deeper in.
Both factions: Ebru in The Barrens (46.0, 35.7).
Both factions: Ebru in The Barrens (46.0, 35.7).
Pattern: Deviate Scale Belt, Sizzle Stick, Dagmire Gauntlets, 4,000 XP.
Deviate Eradication is a level 21 quest; you can pick it up from level 15. It takes you into Wailing Caverns.
All Wailing Caverns quests on one map ·Wailing Caverns dungeon guide
Sources: Quest data from ForeverDB.net · ForeverDB: Wailing Caverns · ForeverDB: Altered Beings · ForeverDB: Hamuul Runetotem · ForeverDB: Nara Wildmane · ForeverDB: Leaders of the Fang · ForeverDB: Deviate Hides · ForeverDB: Deviate Eradication · ForeverDB: Serpentbloom · ForeverDB: Raptor Horns · ForeverDB: Smart Drinks · ForeverDB: Trouble at the Docks · ForeverDB: The Glowing Shard · ForeverDB: In Nightmares (Horde) · ForeverDB: In Nightmares (Alliance)