From reading the battle text, it looked like the 2 rune assassins in the skinner's basement were doing massive backstab damage while in plain view and in front of my characters..even after I killed the 2 visible assassins and the skinner's employer made his escape I never saw anyone else. Is this a special ability by rune assassins? Or did invisible ones escape? It appeared that the visible ones were dong the damage from reading the text. Thx