Found a bug I think..
Zone: Ashvenvale
NPC Name: Mist Howler
Level: 22
Type: Wolf/Beast
Rarity: a Rare/Silver Dragon NPC
Problem: http://oi65.tinypic.com/2nl8pie.jpg
Pretty sure a level 22 shouldn't be hitting for 423pts of damage vs a level 20 orc shaman.
I did manage to kill him by Frost shock kiting.