Suddenly two of Barsavi 's trusted bodyguards , the fierce Berengias sisters , turn on him .
Suddenly two of Barsavi 's trusted bodyguards , the fierce Berengias sisters , cut down Barsavi and his two sons .
Suddenly two of Barsavi 's trusted bodyguards , the fierce Berengias sisters , turn on him and cut down Barsavi and his two sons .