Bloodsaber Defiler's Head  

 

Was taking my lvl 18 Druid to Jaggedpine forest to do some foraging, when I ran into her in the caves at Surefall Glade. She immediately aggro'd on me. Didn't have any buffs up at the time, and the only attack spell I had loaded was Stinging Swarm. Got feared once, and still managed to finish her off with 60% of my health remaining. Hope this helps someone gauge if they're tough enough to take her.