If you kill him, you will get faction hit. Your faction standing with Karana Residents get worse. Your faction standing with Guards of Qeynos get worse. Your faction standing with Priests of Life get worse. Your faction standing with Knights of Thunder get worse.
Killed him today with a 39 monk and 33 druid, there wasnt anything special on him, and nothing special about him except that fact that he he hit for 110 damage.