In order for you to do this your character must be very experienced. Go into Oakvale and kill 1020 gaurds without dying or leaving town. Keep killing gaurds, eventually after hours of fingernumbingbuttonsmashing, white balverines will respawn in the place of gaurds.
The white balverines will keep coming so long as you dont die or leave town.
This is good for experience or a white balverine as your summon.

PS: THIS TAKES A LONG TIME TO DO (4 HRS MAX)
PSS: THIS DOES WORK, I WOULDNT MAKE A FABLE FAN DO ALL THIS FOR NOTHING. Happy Hunting