Imagine, you are digging a wall and when you are mid swing of the pickaxe, an scithe comes from inside the wall and cut you Head before you can think what was that... His wraiths could kill hall of these rés guarda easilly. And probably the second half too.
Depending on the dizer of the Blade they could position below or above the enemie haise the wepon(or lower) behind them and pull them to cut them in half too... No one would even ser the weapons comming
Montcultivation