The Gorehorn Butcher, loc -19.49, -6.00, -175.17 in Runnyeye.
Mob is a 36^^^ minotaur, has 4 friends 'a gorehorn hulk' that are 36vv and vvv
Confirmed drops this weapon (hhttp://lootdb.com/eq2/item/1632097444) and also drops Belt of Concealment (http://lootdb.com/eq2/item/573171688)