Woo! I'm so happy! I killed a black kat on the mission weight of darkness, I must have been super lucky for the dark ritual book token to drop on my first black kat like that... I wonder what the drop rate is... I've only seen 4 people with one at the moment.
I recorded the boss fight in case anyone would like to watch it: http://www.youtube.com/watch?v=57bvnT20UfE
Nice work Three Rings, awesome update!
CombatMedic
How do you get it?